tiingo/api.py
def _invalid_frequency(self, frequency):
        """
        Check to see that frequency was specified correctly
        :param frequency (string): frequency string
        :return (boolean):
        """
        is_valid = self._is_eod_frequency(frequency) or re.match(self._frequency_pattern, frequency)
        return not is_valid
def _invalid_frequency(self, frequency):
        """
        Check to see that frequency was specified correctly
        :param frequency (string): frequency string
        :return (boolean):
        """
        is_valid = self._is_eod_frequency(frequency) or re.match(self._frequency_pattern, frequency)
        return not is_valid
Check to see that frequency was specified correctly
        :param frequency (string): frequency string
        :return (boolean):