CPU vs clone

CPU

noun
  • The main computer case containing the central components of a personal computer. 

  • Any character or entity controlled by the game software. 

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 CPU and clone occurred in a corpus of books? (source: Google Ngram Viewer )