If it's usually for "Number Two", then that sounds like you have a problem with either a)your eating habits or b)your digestive system.
Not to diss Harley, but she's wrong about the rate of digestion. It takes an average of eight (8) hours to digest food from the moment you bite it to the moment it lands inside your digestive tract. The excretes you have after eating is the food you ate 15-24 hours prior.
I'd recommend seeing a doctor or a gastroenterologist to be certain you don't have anything wrong with your intestinal function. I'd also like to point out that going "Number Two" at least once a day is considered having a healthy digestive system by doctors.
Because the faster your food digests the faster you have to go pee & poop it out.