I'm glad you posted this. My son is 3 and he usually only pees 2-3 times per day. it drives me crazy because I feel like it's not enough. There are some days that he wakes up and does not pee all morning... like, maybe his first pee of the day is at 11 a.m. or even noon. He NEVER pees at night, so this means he sometimes goes from 7:30 p.m. - 11:00 a.m. without peeing. I don't know how he does it.
I think some kids just have bladders of steel.