I shudder to think how many rounds it would take to lock up a decent centerfire revolver due to lack of cleaning.
Not many. Actually none. Just a little dirt in the right spot and a revolver becomes as useful as a brick until it can be taken apart.
A semi-auto can easily be fieldstripped and cleaned with no tools. Without proper tools and a lot of time the best you can do with a revolver is wipe down the exterior.