I would plan on missing 50% of everything. anything better is cake. disclaimer: i don't work for FDX.

At UPS the schedule is 13-14 days out of 28 if not on reserve. Reserve 15 out of 28. Live in domicile and bid reserve you may be home, may be sent out for over 20 days in a row.

Bid turns at UPS and work from 0300-1200 or 1500-0030 figure in sleeping for 8 hours somewhere but home every day

seniority rules but still have to work within the confines of the business model. And if you are not already hired plan on a decade to get senior in your seat.