They cut their grass at least every three days. There is one or more mowers running somewhere nearby just about every day.
Maybe they just don't have anything better to do. Maybe they love riding around the yard on their John Deere tractors. I kind of like that myself. But not every three days.
If they aren't cutting the grass they are doing other work so the trimmers and leaf blowers are running all the time too.
It's so bad that I can just not cut my front grass for a few days and one of them will do it for me. They just can't find enough grass to cut to keep them happy I guess. I appreciate it though.