What's the maximum duration you have spent on a work as a freelancer?

[Btaliat]

The day that I heard someone telling me that he has spent a week on just a task as a freelancer, then I messed to believe that there would be someone out there as well that might have gone through this before. I always heard people mentioning hours or a day at max. What's the maximum duration that you have heard before? Share the experience in the comment section. This will make everyone to learn from it.