gadfly vs tabanid

gadfly

noun
  • Any dipterous (“two-winged”) insect or fly of the family Oestridae (commonly known as a botfly) or Tabanidae (horsefly), noted for irritating animals by buzzing about them, and biting them to suck their blood; a gadbee. 

  • Synonym of gadabout (“a person who restlessly moves from place to place, seeking amusement or the companionship of others”) 

  • A person or thing that irritates or instigates. 

  • A person who takes without giving back; a bloodsucker. 

  • A person who upsets the status quo by posing novel or upsetting questions, or attempts to stimulate innovation by being an irritant. 

tabanid

noun
  • A horsefly. 

adj
  • Of or pertaining to species of the horsefly family, Tabanidae. 

How often have the words gadfly and tabanid occurred in a corpus of books? (source: Google Ngram Viewer )