What's the difference between drayman and draymen?

Drayman

Definition:

• (n.) A man who attends a dray.

Example Sentences:

• (1) Bevin left school at 11 to take a job as a farm boy, and was subsequently a kitchen boy, a grocer's errand boy, a van boy, a tram conductor and a drayman before, at the age of 29, he became active locally in Bristol in the Dock Wharf, Riverside and General Labourers' union.

Draymen

Definition:

• (pl. ) of Drayman

Example Sentences:

• (1) Five years ago, I walked with McGovern around the "Granby triangle" riot zone, which, he explained, "I wouldn't visit often as a white working-class lad, unless it was to buy all that fantastic fruit, mangoes and stuff, which – if my memory doesn't play tricks – were sold off wooden draymen's carts."