public IHttpActionResult GetById(int id)
        {
            _loggerService.CreateLog(_user, "API", "FrequencyController", "Frequency", "Get By Id", id.ToString(), null);
            Frequency frequency = _frequencyRepository.GetFrequencyById(id);

            if (frequency == null)
            {
                return(NotFound());
            }

            return(Ok(frequency));
        }