darg

Etymology 1
First attested in late ; a form of, developed through the series of forms:  →  →  →  → * →  →.

Noun

 * 1)  A day's work.
 * 2)  A defined quantity or amount of work, or of the product of work, done in a certain time or at a certain rate of payment; a task.

Etymology 2
The of   has merged with  in many American dialects.

Etymology
Alteration of dark, a contraction of dawark, daywerk ‘day's work’.

Noun

 * 1) a day's work (especially agricultural labour)
 * 2) an amount or number of something produced in a day