How many was the most times you ever grinded an instance for a single specific item?

[Cheremia]

450+something times in 4 days
Ravana ex
I have Ravana shaped cancer now and every time i hear his music, although loving it, and seeing him spawn makes me want to jump off the cliff

Thanks game

[sarehptar]

I did quite a few Leviathans to get his pony back before the drop rate increased and exactly 67 Thordans before I won the bird, but the real stand out memory for me is the time I had to do 403 fates to get one atma stone, whatever one it was that dropped from Kobolds area. The drop rate when they first came out was so abysmal I am still twitchy-eyed thinking about it right now...