1. Invest a couple of minutes to flip through the pages. This is addressed just about daily - if you get 175, ORD is a junior base. See above regarding getting the 175.
2. About 55%-ish on the seniority list currently for 175. I imagine it will trend to 47-50ish eventually and 145 more junior. "How long" is a function of movement of the said seniority list. No flow no newhires - long. Flow and newhires - less long.