Multiple Site Search


I got a mid-website with around 1500 pages.

About half my site has its own search engine with its own URL and the main website has another URL.
Say :

Both “sections” are on the same Piwik site (same idSite).

Is there a way to get 2 different Search engine stats ?

I don’t know how to use it but maybe by adding “search_cat” ? If so, should I add “search_cat=main” and “search_cat=subsite” to distinguis them ?

Thanks for any clarification.