Layla varies too- if i took her out every hour- she'd squeeze something out.. lol.. just cause she is there
if we are travelling all day- she probablY COULD go all day without peeing but will usually pee 2-3 times... when we are home- i'd say on average- she'll be 4-5 times- because i take her out thinking she needs to go- if I let her decide when she wants to go (assuming she'd tell me)it would probably vary from 3-7 times a day- she eats home cooked food which tends to be high in liquid so she pees more often than kibble fed dogs probably- but like you said, it varys by day!