All the time-at least thats what it felt like. I remember the nights being fairly 1.5/2 hourly but the day time was pretty random. Try not to time it, just go with the flow. The fact is for the first 4-6 weeks its feed feed feed and its pretty difficult to get anything else done as once one feed finishes its only a short time til another BUT it does get better, once your baby is a bit bigger and his tummy is bigger there will be a bigger gap and a better routine. Keep up the good work x