FedEx is 15 R days in one of our 28 day bid months and 19 in a 35 day month.
Probably about a fourth to a third of the time I’ve sat out 24 hour call out the companies brought me in for a HSBY
We also have 2 Reserve windows bracketed by the 6’s. (0600-1800) But they’re seldom used currently.
We also tend to have 2-3 Airport Stby folks each day in Memphis. Early assignments on a normal reserve day, and often back filled if used.
Does UPS do anything similar as well?