How long does it take for your sign-up bonus to land in your checking?

I’m expecting to get a $15k sign up bonus once I complete tech school. My contract states it’ll be issued after tech school, but doesn’t specify the exact timeline. It also doesn’t specify if it’ll be paid out over time or in a single lump sum.

I tried to go to Finance to get some answers, but they were wishy-washy about it: ”Well, we think it’ll be paid out over time… Who knows.” (…Um, you’re finance. You can’t look up financial things on that computer in front of you??)