It can vary a lot with me. If I call a pair and kill both, I will wait a few weeks and go back. That usually give time for some new blood to have moved in. If I get busted/have one get away, then it can vary. I may go right back in a few days later with a different set and sound, and try it again. If that doesn't work then I will lay off it for several months. I think the main factor is, are you killing what you call in? The old saying "Dead men tell no tales," comes to mind. Population density can have a big factor in it too.
I have one place that is 960 acres, I have called it 4 times this spring. I got a single, a blank (got mobbed by cows), a double, and a single. So 4 coyotes on four stands, all within less than 8 weeks, and 500 yards of each other. Also this place has been flown with a helicopter TWICE in that same time period, with them killing several coyotes on each pass. Fact is, it is prime habitat with lots of gyp-rock caves for denning, and new coyotes move in about as fast as you kill them out. Most places are not that way and can't be hunted like that. The key on this place is kill them and don't educate them. Having said that, I probably won't hunt it again until this fall, unless I go to the back corner where I haven't been yet.
There is no easy answer. Every place is different.