In reply to ashbid:
I haven't checked the graphs but I suspect that some of the routes on the south west face at Almscliff could be contenders for the most climbed. They have all been known about for well over 100 years (first published guide came out in 1913) and Almscliff is pretty much an all year round crag.
Because there are less routes here than at Stanage and the SW face is short, ever-dry and soloable routes like Birds Nest Crack, Traditional Climb and 3 chockstones chimney could well be near the top of the list. I'm pretty sure I've done Birds Nest at least 300 times and will have descended 3 chockstones chimney well over 1000 times during solo sprees within the last 49 years.