code: function getDuplicates(node, phrases) {
      var duplicates = {};
      search(node, phrases, function (match, position, parent, phrase) {
          duplicates[phrase] = duplicates[phrase] ? duplicates[phrase] + 1 : 1
      });
      return duplicates;
  }
docs: /*
  Methods.
   
  Get any duplicated Words in `node`.
  
  @param {Node} node - Parent to search in.
  @param {Array.<string>} phrases - Phrases to search for.
  @return {Object}