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

[Ronove]

I've also run the Great Gubal Library for the caster coat and I lost count how many times I ran that. I would switch between SMN/BLM and just run it a few times every other day. I felt so bad for any under lvl 60 tank I was paired with since it was before the ilvl sync so I'd be ilvl 200 with the poor leveling tank. Everything died really fast though. When I finally got it I just told myself: NEVER AGAIN.

Of course then the Plague Bringer caster coat came out so it's not even glamoured at the moment.

Edit: Oh! And also the Bard/Machinist top from the Aery. I was running that on Bard well into lvl 59 before I just gave up. Maybe when my Machinist gets up to that level, I'll spam it some more. I have the MNK/NIN top but have never once seen the BRD/MCH top.