You have no idea. I take a toilet break at least once every two hours, sometimes more, and I'm not quick about it. It could easily be an hour a day.
For once I don't even hate my job and I'm not even really trying to steal time away. It's just a convenient excuse to get up, stretch and refresh a bit. I do it at the end of a task or goal and I need to start planning the next section of work so the mental reset is really useful. Honestly, it probably makes me more productive than if I just stayed at my desk.
Nobody is going to complain, my work gets done and it gets done fast. If anyone questions it I'll just say I have IBS or something and it'll come under TMI.