routine, often dull, writing done by a hack2 (sense 2)
hackwork in American English
(ˈhækˌwɜːrk)
noun
writing, painting, or any professional work done for hire and usually following a formula rather than being motivated by any creative impulse
Word origin
[1850–55; hack2 + work]This word is first recorded in the period 1850–55. Other words that entered Englishat around the same time include: ethylene, headhunting, heavyweight, proletariat, segue