Grazhak the Berzerker spawn time

[iasus]

I know where he roams and I know the PH'r, just curious if anyone can tell me if there is a spawntime and what it is. It must be something ridiculous cause I've killed him and the PH'r before and logged back on an hour later to get nothing and no one in zone said they had killed him or the priest. Much help would be appreciated!
Lexigan Swiftblade