I want to setup prometheus for a specific senario.I want to store metrics for 1 year of interval 15 seconds.But data of 3 months past as not so important I want interval of of 5 minutes.

I mean if I got 12 months data in my prometheus timeseries database I want 9 month old data to be interval of 5 minutes and 3 months later data as it can be important , interval of 15 seconds.Is it possible ? thanks