Cache control?

I work for a fairly large site and with many years, it turns out that every time Google, Microsoft or any search engine downloads the xml, the processing goes up a lot and the number of requests is enormous.

Since we have posts from many years ago, I would like to know how I can generate a cache of the xml from previous years, since I don’t see the point that every time a 2016 file is requested, it is generated from 0.

Hopefully someone can help me.