Never !!
However I have been known to take a couple hours to go 100 yds in the woods !! Just find a place and point your nose into the wind and go SSSSSsssslllllllloooooowwwww !!! If I find a great ambush spot and there are other folks pushing the critters I will wait a couple hours but no more, I don't have the patience for that either !!!
Good luck !!