dislike vs gadfly

dislike

noun
  • Something that a person dislikes (has or feels aversion to). 

  • An individual vote showing disapproval of, or lack of support for, something posted on the Internet. 

  • An attitude or a feeling of distaste or aversion. 

verb
  • To have a feeling of aversion or antipathy towards; not to like. 

  • To leave a vote to show disapproval of, or lack of support for, something posted on the Internet. 

gadfly

noun
  • A person or thing that irritates or instigates. 

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

  • 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. 

  • 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. 

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