my fave topic, or it used to be.
I think quite normal in the day time 'now' but I stopped all caffine and drink herbal tea or water and plenty of it. ONLY once a night now, used to be up to 5 times, and I am often only there 6 hours.
I still have issue's with travelling though, but I am pretty certain that is in my head and the anxiety of there not being a loo available. Luckily I dont travel so much.