Hi Camanarac and welcome to the forum,

I have read your words and looked at your sample and don't understand it.

In Columns E to I you call them TIME. Is that Time of Day? I just don't see like in row 18 you have 1331 occurences with 5 different Revs but the sum of the columns E to I don't add to 1331.

Perhaps you could give a better or real example of what is going on here. I'm thinking you are in charge of a programming development company and each document is a peice of code. Each time someone checks it out to work on it that would be called an occurence. When they check it back in you see how many lines of code have changed so that might be ????

I'm so lost on this question. Please try again.