I've owned Stranger Than Fiction for about 8 years now & it's a movie which I had bought without even watching. Just imagine how much I would've loved it to watch it so many times. But don't worry, there are not that many movies which I've loved to this extent to watch more than 10 times forget 50. I could just name Titanic, Maine Pyar Kiya, Hum Aapke Hain Koun, Ulta Palta (Kannada), Kshana Kshanam (Telugu), Sathi Leelavathy (Tamil), Pushpaka Vimana (Kamal's silent film), Bangarada Panjara (Kannada), Stranger Than Fiction are the only ones which I've watched that many times. MPK & HAHK credit goes Zee tv a lot. Then there's Arnie starrers Terminator, Predator etc.. which is not 50 but considering it's telecasts on tv since the 90's I could say 10-12 times there itself, add another 5-6 times with my dvd & another 3-4 times from the Blu-Ray extented director's cut versions.
And in case of Titanic, 39 times was watching it on the big screen (37 times back in 1997/98 & 2 times in 3D in 2012). Rest all those movies were tv viewing in case of MPK & HAHK, in case of Kshana Kshanam, it was my dad's vhs cassette which had become tradition to watch it on sundays along with all the neighbours. The number of times I have watched Kshana Kshanam is actually more than Titanic, infact more than every other movie. You can count since 1993, 2007 was the year the vcr player got screwed, so 14 years a very long time.