How does it work that we eat few times a day, but usually we poop only once?
Is the colon somehow programmed to buffer the waste until the time is up and then dumps it all further?
Got this thought when observing my dog who eats twice a day (morning and evening) and more or less poops twice a day (morning and evening).
You could also just measure without fasting over a full week and compare averages. Assuming your diet is consistent.