--- a/mobile/android/base/health/BrowserHealthRecorder.java
+++ b/mobile/android/base/health/BrowserHealthRecorder.java
@@ -636,22 +636,23 @@ public class BrowserHealthRecorder imple
         }
     }
 
     /*
      * Searches.
      */
 
     public static final String MEASUREMENT_NAME_SEARCH_COUNTS = "org.mozilla.searches.counts";
-    public static final int MEASUREMENT_VERSION_SEARCH_COUNTS = 5;
+    public static final int MEASUREMENT_VERSION_SEARCH_COUNTS = 6;
 
     public static final Set<String> SEARCH_LOCATIONS = Collections.unmodifiableSet(new HashSet<String>(Arrays.asList(new String[] {
-        "barkeyword",
-        "barsuggest",
-        "bartext",
+        "barkeyword",    // A search keyword (e.g., "imdb star wars").
+        "barsuggest",    // A suggestion picked after typing in the search bar.
+        "bartext",       // Raw text in the search bar.
+        "activity",      // The search activity.
     })));
 
     void initializeSearchProvider() {
         this.storage.ensureMeasurementInitialized(
             MEASUREMENT_NAME_SEARCH_COUNTS,
             MEASUREMENT_VERSION_SEARCH_COUNTS,
             new MeasurementFields() {
                 @Override