Any kind of activity graph mod?
 

I'm having trouble finding something like this. Basically, I'm looking for a mod that will generate a graph by counting posts and post times made in the entirety of the forum's existence, or maybe a date range. I realise this would be very resource-heavy, and perhaps something that could be run manually while a forum is offline.

I'm just interested in a more accurate look at the periods when my forum was more active, and times when it had a bit of a "post drought" so I can figure out why that was.

I guess this is a bit of an odd request so I wouldn't be surprised if nothing of the sort exists, but thanks for reading.

Have you looked at the "User Activity" statistics in the AdminCP?

Oops! I completely missed that, thought the title meant something else. It's not exactly what I was looking for but it's certainly something! Not a graph but useful. Any ideas for pulling all the numbers from the right side (with the intention of calculating an average)? I can't just click and drag, as of course that selects a whole table row instead of the right column.

Also, this appears to update itself as it goes along. It doesn't show any data for dates prior to vBulletin's installation. (I ported the forum over from MyBB.) Maybe I can find a task that will update this from the beginning.