How fast does one go through a gram?

I know that a bump is about 50mg give or take. But how many bumps would the average Joe do in one night? Can you go through it fast or are you done for the night after one or two good hits? Just wondering cuz I want to get some from my source but I don’t want to have a ton left lying around.

Edit: my brother in Christ I’m not interested in how much you can do at the height of your addiction I was asking for newbies💀🙏