PC vs clone

PC

noun
  • A member of the Conservative Party of Canada. 

  • A personal computer, especially one similar to an IBM PC that runs Microsoft Windows (or, originally, DOS), usually as opposed to (say) an Apple Mac. 

  • forty-nine (an allusion to a cartoon character, Police Constable 49) 

verb
  • To make politically correct. 

clone

verb
  • To create a clone of. 

noun
  • A group of identical cells derived from a single cell. 

  • A person who is exactly like another person, in terms of looks or behavior. 

  • A copy or imitation of something already existing, especially when designed to simulate it. 

  • A living organism (originally a plant) produced asexually from a single ancestor, to which it is genetically identical. 

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