Tarantino is a piker in profanity compared to Scorsese who beat his own Casino Guiness World Record for the number of fucks in a film with The Wolf of Wall Street (506, an average of 2.81 per minute). That was 2014 so it may well have been surpassed since then.)
Wikipedia has an interesting list of films that most use fuck “or its derivatives” (presumably including motherfucker). The honours here go to two specialist films (Swearnet, 935, 8.35 per minute and Fuck, 857, 9.21 per minute) with The Wolf on Wall Street taking the top non-specialist spot (569, 3.16 per minute). I’m assuming the difference between the two sets of figures for Wolf is that Guiness is counting only the pure fucks.