Stint....A word used a dozen times in the past, but always with the meaning of a short term of duty.
I learned the word as a child, in a sort of dialectical usage meaning a self-imposed task, such as
picking a quart of blueberries. I was reminded of it by usage in the whaling story menaing
"limited, insufficient": ......."Only fourteen days' stinted allowance of provisions reamined."

stint
vt.
5ME stinten, to stint, cease, stop < OE styntan, to blunt or dull, akin to stunt, blunt, dull: see STUNT16
1 to restrict or limit to a certain quantity, number, share, or allotment, often small or scanty
2 [Archaic] to stop
vi.
1 to be sparing or grudging in giving or using
2 [Archaic] to stop
n.
1 restriction; limit; limitation
2 [Now Rare] a limited or fixed quantity, allotment, share, etc.
3 a) an assigned task or quantity of work b) a specified period of time spent doing something
—SYN TASK
stint$er
n.

stint2 7stint8
n.
5LME stynte < ?6 any of various small sandpipers, as the little stint (Calidris minuta)