anonymous asks: How long did Grog's fights with Kern last?
2 minutes and 18 seconds altogether, or 23 rounds. The first fight lasted a minute and the second a minute and eighteen seconds.
In real time, it was more like an hour and fifteen minutes; 28:56 for the first fight and 46:03 for the second, but Vox Machina was attempting to help more from the sidelines during the second fight, lengthening the time it took to describe the encounter.
For information on this fight and more see the Running Times table.