I very rarely clean the bores on my rimfires. With the powders they use in rimfires, it really isn't too necessary unless they are really bad.
However, I clean the actions very frequently. On my bolt guns, I wipe out and oil the receiver, and thoroughly clean the bolt. Then a very light application of oil slicks the action up for a few hundred rounds. Of course, because of the operating system, Semi rifles get dirtier. I dont know about levers or pumps, I was raised with bolt actions and just kinda moved into semis on my own.
I clean the receiver of my MKII 22/45 pretty much after every time I shoot it. There are teh rare occasions, like the one or two shots at a groundhog or squirrel, or just shooting a few out of it, when Ill let it slide. But for the most part, It stays super clean. Semis are known to act up when theyre dirty.