The total time taken for the request, that is the time from when the
request was received until the results were returned, in a human-readable
format (eg. 123.45ms for a little over 123 milliseconds).
The time taken for the execution of the request, that is the time from
when query execution started until the results were returned, in a human-readable
format (eg. 123.45ms for a little over 123 milliseconds).