I would be surprised if there were more than a ball a day in the FW bunker during the tournament.
i think that bunker sees far fewer balls than you suggest. I am guessing that it maybe a couple of balls per decade during the Masters. I spent a couple of hours at this hole in each of the last two years and I haven't seen anything remotely close. The only way a shot would get in there would be a very bad layup after driving into the trees.