Does this mod exist? Number of posts since...

[Peace_Hope]

I am looking for a mod that would be just a simple script that goes in the admin cp or something and what it does is you simply enter a certain date or time. And then it will come back and tell you how many posts each user has posted since that date and time.

The reason I want this is because I am thinking of starting a posting contest where I will say, For every 5 posts that you make from now until say June 1, You will get that many entries in a drawing for $50.00 cash!

This mod would make it easy for me to then go in at the end of the day on June 1, simply look at all the people who have posted 5 posts, and determine how many spots they get in the drawing, then do the drawing.

Anyone know of this mod or anything like it? Or any other way to do this? Or can someone make this?

Thanks,
Alexander Timm
www.AthleticRunner.com