bot vs gadfly

bot

noun
  • The larva of a botfly, which infests the skin of various mammals, producing warbles, or the nasal passage of sheep, or the stomach of horses. 

  • A physical robot. 

  • A piece of software designed to perform a minor but repetitive task automatically or on command, especially when operating with the appearance of a (human) user profile or account. 

  • A computer-controlled character in a video game, especially a multiplayer one. 

  • A supremely unskilled player. 

verb
  • To ask for and be given something with the direct intention of exploiting the thing’s usefulness, almost exclusively with cigarettes. 

  • To bugger. 

  • To use a bot, or automated program. 

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. 

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