https://github.com/apache/airflow/blob/3a349624a20d3432dc75e337d6ffb1109a50e451/airflow/providers/amazon/aws/operators/athena.py#L49

What is the unit of measurement of time used here?
airflow/providers/amazon/aws/hooks/athena.py
"""
        Fetch the reason for a state change (e.g. error message). Returns None or reason string.
        :param query_execution_id: Id of submitted athena query
        :type query_execution_id: str
        :return: str
        """
        response = self.get_conn().get_query_execution(QueryExecutionId=query_execution_id)
        reason = None
        try:
            reason = response['QueryExecution']['Status']['StateChangeReason']
        except Exception as ex:  
            self.log.error('Exception while getting query state change reason: %s', ex)
        finally:
            
            
            return reason  
    def get_query_results(