For my car at VIR a set of Carbotechs will last at least four sprint races with good performance.

At Roebling they'll last, heck, I don't know, at least six races. Roebling is not rough on brakes.

At CMP a brand new set of pads will last exactly two races (including practice and qualifying). Sometimes you might want to put new ones on for Sunday and save the other half of Saturday's pads for another track. I generally do. But if you run them the whole weekend they will make it but be used up.

Does that help?