If I shoot with small format I use 24 exposures fits 8x10. Unexposed film sits in the camera for weeks or a month or two if I use a film canister with 36 exposures. Only 1 out of 10 images are worth printing. I avoid negatives not exposed correctly, not interesting, or have composition issues. Only the best get printed. If they are family shots intended to be given away more images on the roll may be printed. The more we shoot and print the luckier we are. But luck is always an element.