diff --git a/src/anki/ankiclient.cpp b/src/anki/ankiclient.cpp
index 5a7d131..ee21e73 100644
--- a/src/anki/ankiclient.cpp
+++ b/src/anki/ankiclient.cpp
@@ -1344,6 +1344,8 @@ void AnkiClient::buildCommonNote(
         QString(exp.context2).replace('\n', m_currentConfig->newlineReplacer);
 
     QString frequencies = buildFrequencies(exp.frequencies);
+    const int frequencyHarmonic = getFrequencyHarmonic(exp.frequencies);
+    const int frequencyAverage = getFrequencyAverage(exp.frequencies);
 
     QJsonArray fieldsWithAudioMedia;
     QJsonArray fieldsWithAudioContext;
@@ -1384,6 +1386,25 @@ void AnkiClient::buildCommonNote(
         value.replace(REPLACE_CLOZE_PREFIX, clozePrefix);
         value.replace(REPLACE_CLOZE_SUFFIX, clozeSuffix);
         value.replace(REPLACE_FREQUENCIES,  frequencies);
+
+        /* If the term never occurs in the corpus of any loaded frequency
+         * dictionary, assume it is a very rare word.
+         * (The higher the ranking, the rarer the term) */
+        constexpr int default_freq_rank = 9999999;
+        constexpr int default_freq_occurrence = 0;
+
+        value.replace(REPLACE_FREQ_HARMONIC_RANK, 
+                positiveIntToQString(frequencyHarmonic, default_freq_rank));
+
+        value.replace(REPLACE_FREQ_HARMONIC_OCCU, 
+                positiveIntToQString(frequencyHarmonic, default_freq_occurrence));
+
+        value.replace(REPLACE_FREQ_AVERAGE_RANK,  
+                positiveIntToQString(frequencyAverage, default_freq_rank));
+
+        value.replace(REPLACE_FREQ_AVERAGE_OCCU,  
+                positiveIntToQString(frequencyAverage, default_freq_occurrence));
+
         value.replace(REPLACE_SENTENCE,     sentence);
         value.replace(REPLACE_SENTENCE_SEC, sentence2);
         value.replace(REPLACE_CONTEXT,      context);
@@ -1765,6 +1786,83 @@ QString AnkiClient::buildFrequencies(const QList<Frequency> &frequencies)
     return freqStr;
 }
 
+std::vector<int> AnkiClient::getFrequencyNumbers(
+        const QList<Frequency> &frequencies)
+{
+    QString previousDictionary;
+    std::vector<int> frequencyNumbers;
+
+    for (const Frequency &frequencyEntry : frequencies)
+    {
+        if (frequencyEntry.dictionary == previousDictionary 
+                || frequencyEntry.freq.isNull())
+        {
+            continue;
+        }
+        previousDictionary = frequencyEntry.dictionary;
+
+        /* This regular expression only catches numbers in base 10 and 
+         * would not catch negative or decimal numbers because we make
+         * the assumption that these special types of numbers will not
+         * appear in frequency dictionaries. */
+        QRegularExpression numberPattern("\\d+");
+        QRegularExpressionMatch match = numberPattern.match(frequencyEntry.freq);
+
+        if (match.hasMatch()) 
+        {
+            /* Only save the first number to avoid counting secondary frequency 
+             * information (e.g. frequency for the full kana orthography) in the
+             * aggregate measures to align with Yomitan's behavior. */
+            frequencyNumbers.push_back(match.captured(0).toInt());
+            continue;
+        }
+    }
+
+    return frequencyNumbers;
+}
+
+QString AnkiClient::positiveIntToQString(const int value, const int defaultValue)
+{
+    return (value < 0) ? QString::number(defaultValue) : QString::number(value);
+}
+
+int AnkiClient::getFrequencyHarmonic(const QList<Frequency> &frequencies) 
+{
+    const std::vector<int> frequencyNumbers = getFrequencyNumbers(frequencies);
+
+    if (frequencyNumbers.empty()) 
+    {
+        return -1;
+    }
+
+    double total = 0.0;
+    for (int frequencyNum : frequencyNumbers) 
+    {
+        if (frequencyNum != 0) 
+        {
+            total += 1.0 / frequencyNum;
+        }
+    }
+
+    return std::floor(frequencyNumbers.size() / total);
+}
+
+int AnkiClient::getFrequencyAverage(const QList<Frequency> &frequencies)
+{
+    const std::vector<int> frequencyNumbers = getFrequencyNumbers(frequencies);
+
+    if (frequencyNumbers.empty()) 
+    {
+        return -1;
+    }
+
+    /* Sum the elements in the vector */
+    double total = std::accumulate(frequencyNumbers.begin(), 
+            frequencyNumbers.end(), 0);
+
+    return std::floor(total / frequencyNumbers.size());
+}
+
 void AnkiClient::buildTags(
     const QList<Tag> &tags,
     QString &tagStr,
diff --git a/src/anki/ankiclient.h b/src/anki/ankiclient.h
index 75a74dd..c95df5b 100644
--- a/src/anki/ankiclient.h
+++ b/src/anki/ankiclient.h
@@ -42,6 +42,10 @@
 #define REPLACE_CONTEXT             "{context}"
 #define REPLACE_CONTEXT_SEC         "{context-2}"
 #define REPLACE_FREQUENCIES         "{frequencies}"
+#define REPLACE_FREQ_HARMONIC_RANK  "{frequency-harmonic-rank}"
+#define REPLACE_FREQ_HARMONIC_OCCU  "{frequency-harmonic-occurrence}"
+#define REPLACE_FREQ_AVERAGE_RANK   "{frequency-average-rank}"
+#define REPLACE_FREQ_AVERAGE_OCCU   "{frequency-average-occurrence}"
 #define REPLACE_GLOSSARY            "{glossary}"
 #define REPLACE_SCREENSHOT          "{screenshot}"
 #define REPLACE_SCREENSHOT_VIDEO    "{screenshot-video}"
@@ -445,6 +449,33 @@ private Q_SLOTS:
      */
     QString buildFrequencies(const QList<Frequency> &freq);
 
+
+    /**
+     * Extracts frequency numbers from a list of frequency tags.
+     * @param frequencies A list of Frequency structs.
+     * @return A vector of positive integers representing the frequency numbers.
+     *         (Only selecting the first frequency displayed by a dictionary,
+     *          to avoid picking secondary frequencies like kana frequencies)
+     */
+    std::vector<int> getFrequencyNumbers(const QList<Frequency> &freq);
+
+    // Function to convert integer to QString with a specific default value if `value` < 0.
+    QString positiveIntToQString(const int value, const int defaultValue);
+
+    /**
+     * Function to calculate the harmonic mean of frequencies.
+     * @param frequencies A list of Frequency structs.
+     * @return The harmonic mean as an integer, or -1 if the list is empty.
+     */
+    int getFrequencyHarmonic(const QList<Frequency> &freq);
+
+    /**
+     * Function to calculate the arithmetic average of frequencies.
+     * @param frequencies A list of Frequency structs.
+     * @return The arithmetic average as an integer, or -1 if the list is empty.
+     */
+    int getFrequencyAverage(const QList<Frequency> &freq);
+
     /**
      * Creates the HTML representation of the pitch, pitch graph, and pitch
      * position for the given pitches.
diff --git a/src/gui/widgets/settings/ankisettings.cpp b/src/gui/widgets/settings/ankisettings.cpp
index af40739..fa18dd9 100644
--- a/src/gui/widgets/settings/ankisettings.cpp
+++ b/src/gui/widgets/settings/ankisettings.cpp
@@ -51,6 +51,10 @@ AnkiSettings::AnkiSettings(QWidget *parent)
             REPLACE_CONTEXT,
             REPLACE_CONTEXT_SEC,
             REPLACE_FREQUENCIES,
+            REPLACE_FREQ_HARMONIC_RANK,
+            REPLACE_FREQ_HARMONIC_OCCU,
+            REPLACE_FREQ_AVERAGE_RANK,
+            REPLACE_FREQ_AVERAGE_OCCU,
             REPLACE_GLOSSARY,
             REPLACE_SCREENSHOT,
             REPLACE_SCREENSHOT_VIDEO,
@@ -85,6 +89,10 @@ AnkiSettings::AnkiSettings(QWidget *parent)
             REPLACE_CONTEXT,
             REPLACE_CONTEXT_SEC,
             REPLACE_FREQUENCIES,
+            REPLACE_FREQ_HARMONIC_RANK,
+            REPLACE_FREQ_HARMONIC_OCCU,
+            REPLACE_FREQ_AVERAGE_RANK,
+            REPLACE_FREQ_AVERAGE_OCCU,
             REPLACE_GLOSSARY,
             REPLACE_SCREENSHOT,
             REPLACE_SCREENSHOT_VIDEO,
diff --git a/src/gui/widgets/settings/ankisettingshelp.ui b/src/gui/widgets/settings/ankisettingshelp.ui
index ace660f..7a57f20 100644
--- a/src/gui/widgets/settings/ankisettingshelp.ui
+++ b/src/gui/widgets/settings/ankisettingshelp.ui
@@ -62,21 +62,21 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="20" column="1">
+         <item row="24" column="1">
           <widget class="QLabel" name="labelTermScreenshotEx">
            <property name="text">
             <string>Screenshot of the current frame.</string>
            </property>
           </widget>
          </item>
-         <item row="26" column="1">
+         <item row="30" column="1">
           <widget class="QLabel" name="labelTermTitleEx">
            <property name="text">
             <string>Title of the video. Filename if no title.</string>
            </property>
           </widget>
          </item>
-         <item row="13" column="0">
+         <item row="17" column="0">
           <widget class="QLabel" name="labelTermGlossary">
            <property name="font">
             <font>
@@ -95,14 +95,14 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="17" column="1">
+         <item row="21" column="1">
           <widget class="QLabel" name="labelTermPitchGraphEx">
            <property name="text">
             <string>Pitch graphs for the reading of the term.</string>
            </property>
           </widget>
          </item>
-         <item row="19" column="0">
+         <item row="23" column="0">
           <widget class="QLabel" name="labelTermReading">
            <property name="font">
             <font>
@@ -128,7 +128,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="22" column="0">
+         <item row="26" column="0">
           <widget class="QLabel" name="labelTermSentence">
            <property name="font">
             <font>
@@ -154,7 +154,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="19" column="1">
+         <item row="23" column="1">
           <widget class="QLabel" name="labelTermReadingEx">
            <property name="text">
             <string>The reading of the word in kana.</string>
@@ -202,7 +202,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="21" column="1">
+         <item row="25" column="1">
           <widget class="QLabel" name="labelTermScreenshotVideo">
            <property name="text">
             <string>Screenshot of the current frame without subtitles if visible.</string>
@@ -228,7 +228,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="23" column="1">
+         <item row="27" column="1">
           <widget class="QLabel" name="labelTermSentence2Ex">
            <property name="text">
             <string>The current secondary subtitle.</string>
@@ -242,7 +242,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="16" column="0">
+         <item row="20" column="0">
           <widget class="QLabel" name="labelTermPitch">
            <property name="font">
             <font>
@@ -322,14 +322,14 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="18" column="1">
+         <item row="22" column="1">
           <widget class="QLabel" name="labelTermPitchPositionEx">
            <property name="text">
             <string>Pitch positions for the reading of the term.</string>
            </property>
           </widget>
          </item>
-         <item row="23" column="0">
+         <item row="27" column="0">
           <widget class="QLabel" name="labelTermSentence2">
            <property name="font">
             <font>
@@ -348,7 +348,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="13" column="1">
+         <item row="17" column="1">
           <widget class="QLabel" name="labelTermGlossaryEx">
            <property name="text">
             <string>The dictionary definitions of the expression.</string>
@@ -413,14 +413,14 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="14" column="1">
+         <item row="18" column="1">
           <widget class="QLabel" name="labelTermGlossaryBriefEx">
            <property name="text">
             <string>The dictionary definitions of the expression without dictionary information.</string>
            </property>
           </widget>
          </item>
-         <item row="17" column="0">
+         <item row="21" column="0">
           <widget class="QLabel" name="labelTermPitchGraph">
            <property name="font">
             <font>
@@ -439,7 +439,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="14" column="0">
+         <item row="18" column="0">
           <widget class="QLabel" name="labelTermGlossaryBrief">
            <property name="font">
             <font>
@@ -458,7 +458,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="24" column="1">
+         <item row="28" column="1">
           <widget class="QLabel" name="labelTermTagsEx">
            <property name="text">
             <string>Bulleted list of the term tags.</string>
@@ -536,7 +536,111 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="18" column="0">
+         <item row="16" column="0">
+          <widget class="QLabel" name="labelTermFrequencyHarmonicRank">
+           <property name="font">
+            <font>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>{frequency-harmonic-rank}</string>
+           </property>
+           <property name="alignment">
+            <set>Qt::AlignCenter</set>
+           </property>
+           <property name="textInteractionFlags">
+            <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+           </property>
+          </widget>
+         </item>
+         <item row="16" column="1">
+          <widget class="QLabel" name="labelTermFrequencyHarmonicRankEx">
+           <property name="text">
+            <string>The harmonic mean of frequency data for the current term. Defaults to rank 9999999 when frequency data is not found.</string>
+           </property>
+          </widget>
+         </item>
+         <item row="15" column="0">
+          <widget class="QLabel" name="labelTermFrequencyHarmonicOccurrence">
+           <property name="font">
+            <font>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>{frequency-harmonic-occurrence}</string>
+           </property>
+           <property name="alignment">
+            <set>Qt::AlignCenter</set>
+           </property>
+           <property name="textInteractionFlags">
+            <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+           </property>
+          </widget>
+         </item>
+         <item row="15" column="1">
+          <widget class="QLabel" name="labelTermFrequencyHarmonicOccurrenceEx">
+           <property name="text">
+            <string>The harmonic mean of frequency data for the current term. Defaults to 0 occurrences when frequency data is not found.</string>
+           </property>
+          </widget>
+         </item>
+         <item row="14" column="0">
+          <widget class="QLabel" name="labelTermFrequencyAverageRank">
+           <property name="font">
+            <font>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>{frequency-average-rank}</string>
+           </property>
+           <property name="alignment">
+            <set>Qt::AlignCenter</set>
+           </property>
+           <property name="textInteractionFlags">
+            <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+           </property>
+          </widget>
+         </item>
+         <item row="14" column="1">
+          <widget class="QLabel" name="labelTermFrequencyAverageRankEx">
+           <property name="text">
+            <string>The average of frequency data for the current term. Defaults to rank 9999999 when frequency data is not found.</string>
+           </property>
+          </widget>
+         </item>
+         <item row="13" column="0">
+          <widget class="QLabel" name="labelTermFrequencyAverageOccurrence">
+           <property name="font">
+            <font>
+             <weight>75</weight>
+             <bold>true</bold>
+            </font>
+           </property>
+           <property name="text">
+            <string>{frequency-average-occurrence}</string>
+           </property>
+           <property name="alignment">
+            <set>Qt::AlignCenter</set>
+           </property>
+           <property name="textInteractionFlags">
+            <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+           </property>
+          </widget>
+         </item>
+         <item row="13" column="1">
+          <widget class="QLabel" name="labelTermFrequencyAverageOccurrenceEx">
+           <property name="text">
+            <string>The average of frequency data for the current term. Defaults to 0 occurrences when frequency data is not found.</string>
+           </property>
+          </widget>
+         </item>
+         <item row="22" column="0">
           <widget class="QLabel" name="labelTermPitchPosition">
            <property name="font">
             <font>
@@ -555,7 +659,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="21" column="0">
+         <item row="25" column="0">
           <widget class="QLabel" name="labelTermScreenshotMedia">
            <property name="font">
             <font>
@@ -594,7 +698,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="26" column="0">
+         <item row="30" column="0">
           <widget class="QLabel" name="labelTermTitle">
            <property name="font">
             <font>
@@ -613,14 +717,14 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="16" column="1">
+         <item row="20" column="1">
           <widget class="QLabel" name="labelTermPitchEx">
            <property name="text">
             <string>Pitch accents for the reading of the term.</string>
            </property>
           </widget>
          </item>
-         <item row="22" column="1">
+         <item row="26" column="1">
           <widget class="QLabel" name="labelTermSentenceEx">
            <property name="text">
             <string>The current subtitle.</string>
@@ -669,7 +773,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="24" column="0">
+         <item row="28" column="0">
           <widget class="QLabel" name="labelTermTags">
            <property name="font">
             <font>
@@ -688,7 +792,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="25" column="0">
+         <item row="29" column="0">
           <widget class="QLabel" name="labelTermTagsBrief">
            <property name="font">
             <font>
@@ -707,14 +811,14 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="25" column="1">
+         <item row="29" column="1">
           <widget class="QLabel" name="labelTermTagsBriefEx">
            <property name="text">
             <string>Bulleted list of the term tags without description.</string>
            </property>
           </widget>
          </item>
-         <item row="20" column="0">
+         <item row="24" column="0">
           <widget class="QLabel" name="labelTermScreenshot">
            <property name="font">
             <font>
@@ -752,7 +856,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="15" column="0">
+         <item row="19" column="0">
           <widget class="QLabel" name="labelGlossaryCompact">
            <property name="font">
             <font>
@@ -771,7 +875,7 @@ These will expand to larger expressions in the final card.</string>
            </property>
           </widget>
          </item>
-         <item row="15" column="1">
+         <item row="19" column="1">
           <widget class="QLabel" name="labelGlossaryCompactEx">
            <property name="text">
             <string>The dictionary definitions of the expression in a compact form.</string>