Hmm. If I shoot it, I pretty much clean it, that day. Exception would be if I’m not home, and planning to use it the next day, or, if the dog is so full of burrs she needs a comb, cut and bath. Gun gets it the next day, in either event. A few of the pump guns have gone for a duck season as loaners, I cleaned them when they came home, and I have let a pump run for a month of trap season, if the weather has been fair.
I’ve seen some pumps that lived horrific lives, the dang things just keep working, however. Still bugs me to see it.

Best,
Ted