['$scope', function($scope) {
  var debounce = function(cb) {
    var timeout = null;
    return function(data) {
      if (timeout) {
        clearTimeout(timeout);
      }
      timeout = setTimeout(function() {
        cb(data);
      }, 200);
    };
  };
  
  $scope.$watch('submission.data', debounce(function(data) {
    // Put your logic here.... 
  }));
});