Green’s Dictionary of Slang

a schedule.

1958		R. Stow To Islands 88: I took your telegram [...] to send to the doctor, but it was too late for the sched, and the old man wasn't there.
1963		L. Diack Labrador Nurse III 91: There was the radio-telephone [...] and there was always a daily ‘sched’ at twelve noon [OED].
2001		N. Barlay Hooky Gear 13: Left of him he got his haulage scheds clip up on the wall.