bot vs robot

bot

noun
  • A physical robot. 

  • 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 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. 

robot

noun
  • A machine built to carry out some complex task or group of tasks by physically moving, especially one which can be programmed. 

  • A habitual poster on the /r9k/ board on 4chan; a member of the /r9k/ community. 

  • A theodolite which follows the movements of a prism and can be used by a one-man crew. 

  • A traffic light (from earlier robot policeman). 

  • A style of dance popular in disco in which the dancer imitates the stiff movements of a stereotypical android robot. 

  • A person who does not seem to have any emotions. 

  • An intelligent mechanical being designed to look like a human or other creature, and usually made from metal. 

  • A system of serfdom used in Central Europe, under which a tenant's rent was paid in forced labour. 

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