I see you're excluding "caretaker" appointments which doesn't suit a measure of managerial stability - should be included, no? If you do there have been a few more than that.
Ah good point. Then do we need another chart by Club showing number of managerial appointments in the last,say, 5 years? (looking at you Derby, Leeds etc etc).
There's a good football club in there somewhere, somebody should be able to do a great job. Dr Tony being the unknown quantity of course. Bruce seems most likely.