if it gets shot a lot. . . it really doesn't get cleaned a lot
kinda a contridiction, but im not breaking down my 22 for 100 rounds
my MK II, when it starts cycling slowly, about 750 rounds
my AR-15s-300-400 rounds, whether they need it or not
glocks -200-300, cause i shoot lead out of them, and still fear a KB
sks's- when they cease to function properly.
only exception is the mosin nagant, that gets windex after every shooting session to prevent the corrosive ammo from workin her over
for the guns that are my fathers and don't get shot as much, i'll wipe them down with oil every 6-7 months. those golden rods and silica packets do wonders to keeping rust down. i used to have to do it every 3-4 months.