code: function topVerbs(activities, count) {
      var counts = {},
          list = [],
          top;
      for (var i in activities) {
        var verb = activities[i].verb;
        counts[verb] = (counts[verb] || 0) + 1;
      }
      for (key in counts)
        list.push({ key: key, values: counts[key] });
      top = list.sort(function(a, b) { return b.values - a.values })
        .slice(0, count)
        .map(function(verb) { return verb.key })
        .concat("other");
  
      // Make sure all verbs are showing by default.
      verbsShowing = top.reduce(function(showing, verb) {
        showing[verb.key] = verbsShowing[verb];
        if (showing[verb] == undefined)
          showing[verb] = true;
        return showing;
      }, {});
  
      return top;
    }
docs: Returns a group with the top verbs.  activities - All activities count      - How many verbs to show  Returns a list of top verbs plus 'other'