I generally go once in the morning (going from being horizontal in bed to being vertical out of it usually does the trick) then I’m done for the day. But even if I have to go again I can generally hold it at least for a bit unless it’s a food poisoning type situation… ¯\(ツ)/¯
But then, digestive systems vary widely, so all that matters is what’s normal for you.
I actually have IBS so I feel your pain, to some extent anyway… For most of my life I was not regular and would go anything from once every few days to several times a day, but then at some point, it just… Regulated? I don’t know how or why, I wish I could give some advice, but it just happened…