Both Uses of

drudgery
in
Gulliver's Travels

That my health was much impaired, by the continual drudgery of entertaining the rabble every hour of the day; and that, if my master had not thought my life in danger, her majesty would not have got so cheap a bargain.†
Chpt 2 *

I owned "that the Houyhnhnms among us, whom we called horses, were the most generous and comely animals we had; that they excelled in strength and swiftness; and when they belonged to persons of quality, were employed in travelling, racing, or drawing chariots; they were treated with much kindness and care, till they fell into diseases, or became foundered in the feet; but then they were sold, and used to all kind of drudgery till they died; after which their skins were stripped, and sold for what they were worth, and their bodies left to be devoured by dogs and birds of prey.†
Chpt 4

Definition:

hard, unpleasant, and boring work