Granted, I'm missing probably 20-25% of my matches... so interpolate the numbers as you will... 382 Hours worth...
Killing Spree: 1310
Rampage: 153
Dominating: 21
Unstoppable: 9
Godlike: 5
I know I've gotten at least 2 more Godlikes on servers that didn't report.
So.. interpolated for 20% of games played not reported (and my 2 other Godlikes)...
458 Hours
Killing Spree: 1572 @ 3.4/hour (or 3 every hour)
Rampage: 183 @ .39/hour (or 1 every 2.5 hours)
Dominating: 25 @ .05/hour (or 1 every 18 hours)
Unstoppable: 11 @ .02/hour (or 1 every 41 hours)
Godlike: 7 @ .015/hour (or 1 every 65 hours)
Yes, I'm a stat-whore.
This goes back to my |C|Rooster|PuF days - and honestly, most of these were likely clan matches (cept for killing sprees, which I would say about half were pub games).