'Grafana data shown by hour

I'm using Grafana and I want to see which hours are better to perform operations. So, I want to sum the requests and show the number of requests per hour in, let say, the last week. I mean: how many requests it had from 9:00 to 10:00 despite any day of the last week (and the same for every hour).

My backend is elasticsearch, but I can gather information from a prometheus too.

Does anyone know any way to get these data shown?

The Grafana version I'm using is 7.0.3.

EDIT

I found a possible solution by adding the plugin for hourly heatmaps



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