Retrieve number of requests in interval with default http_server_requests_count and http_server_requests_sum

By default @Timed @Timed Spring Documentation is able to show the metric with http_server_requests_sum and _count. The latency can be computed as my_metric_sum/my_metric_count but how can I get the _total?
I would like to know if it is possible to use the above metrics to get the number of requests in an interval of time.