The 61 was every 20 mins i think but was dropped to 30 mins once the changes happened, the 2A/2C stopped as they are now (Hourly each), as for the current PVR i have no idea.
I'm really surprised that the 2A/2C frequency hasn't changed on a Sunday, i don't really know what the numbers are like.
RE: Go North East
Ooo Friend, Bus Friend.