docs: function characterOccurance(stringToTest) {
      var chars = {},
          allowedOccurancy,
          valid = true;
  
      stringToTest = _.toString(stringToTest);
      allowedOccurancy = stringToTest.length / 2;
  
      // Loop through string and accumulate character counts
      _.each(stringToTest, function (char) {
          if (!chars[char]) {
              chars[char] = 1;
          } else {
              chars[char] += 1;
          }
      });
  
      // check if any of the accumulated chars exceed the allowed occurancy
      // of 50% of the words' length.
      _.forIn(chars, function (charCount) {
          if (charCount >= allowedOccurancy) {
              valid = false;
          }
      });
  
      return valid;
  }