The meaning of metric

Hi list,

I'm looking for the meaning of some of the Traefik metrics more specifically both these histograms:

  • traefik_service_request_duration_seconds
  • traefik_entrypoint_request_duration_seconds

The # Help for these metrics in the /metrics endpoint says:

How long it took to process the request on a service,
How long it took to process the request on an entrypoint

My question is 2 fold:

What exactly is measured here? Between which 2 points in the exchange time is measured?
What's the difference between time per service and per entrypoint? (I assume it's just a breakdown over service and entrypoint respectively?)

Many thanks!

smetj