I was ok with my once a week guy, sexually frustrated but sex isn't the only reason you are together, some is better than none.
When it became none I got too frustrated and after 5 years with no sex cheated so - not well, is how I dealt with it.
But when it was just less than I wanted but regular, mostly what happened was I wouldn't do much for him, like could not do oral, because if he got off that was it for the week.
I guess I don't have constructive tips, but I guess at least an example of how NOT to handle it - please communicate, communicate, communicate.
Now I am with a guy who wants every day, and we compromise up not down, meaning if either of us wants sex we do it, that only works because we both want it pretty much all the time.