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
:return: PageIterator
        """
        query_state = self.check_query_status(query_execution_id)
        if query_state is None:
            self.log.error('Invalid Query state (null)')
            return None
        if query_state in self.INTERMEDIATE_STATES or query_state in self.FAILURE_STATES:
            self.log.error('Query is in "%s" state. Cannot fetch results', query_state)
            return None
        result_params = {
            'QueryExecutionId': query_execution_id,
            'PaginationConfig': {
                'MaxItems': max_items,
                'PageSize': page_size,
                'StartingToken': starting_token,
            },
        }
        paginator = self.get_conn().get_paginator('get_query_results')
        return paginator.paginate(**result_params)
    def poll_query_status(self, query_execution_id: str, max_tries: Optional[int] = None) -> Optional[str]:
        """
        Poll the status of submitted athena query until query state reaches final state.
        Returns one of the final states
        :param query_execution_id: Id of submitted athena query
        :type query_execution_id: str
        :param max_tries: Number of times to poll for query state before function exits
        :type max_tries: int
        :return: str
        """
        try_number = 1