The frequency of elimination is directly related to the timing of food and water intake. For instance, there is a normal reflex in place so that when new food is added to the stomach it triggers a signal to empty the colon. The pattern of elimination is also influenced by activity level and the success of your training routine. In young puppies less than 12-24 weeks the ability to postpone elimination is developing but is not very good. Generally you could expect elimination each 1-2 hours when your puppy is awake