Talk:Ainz Ooal Gown/Abilities and Powers/@comment-138.162.0.43-20151123172428/@comment-27099834-20151123172701

You said it yourself, after level 70. The first over rank is at 71 making it 30 in total.

So a maximum of 3 uses per day. However the author could just make it that at level 100 the first over rank learnt earns an additional use to a maximum of 4. As usual with these matters, whatever the plot needs.