The rhetorizor, in its cricket's voice, intoned folksily, "We think of rats, of course, as our enemy. But consider their vast value in cancer research alone. The lowly rat has done the yeoman's service for huma—"

Watchdogs such as The Washington Post’s Glenn Kessler, who writes the Fact Checker column, or Politifact.com and FactCheck.org, do yeoman’s service policing the advertising and the slippery statements from candidates and campaigns.

Beyond these beaches the straight sheer cliff sweeps on with what looks like an unbroken wall, though in truth it is gashed by creeks and inlets, while one beach, the Marina di Cassano, has in its time done yeoman's service to the trade of all the plain.

And he thought what yeoman's service Longcluse might and would have rendered him in this situation.

In doing this, you did me yeoman's service, although you are even now not aware of this.