PC vs brain

PC

verb
  • To make politically correct. 

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) 

brain

verb
  • To strike (someone) on the head. 

  • To destroy; to put an end to. 

  • To dash out the brains of; to kill by smashing the skull. 

noun
  • A part of the brain, especially associated with particular mental functions, abilities, etc. 

  • Mind. 

  • A loose compartment of a backpack that straps on over the top opening. 

  • An intellectual or mental capacity. 

  • A person who provides the intelligence required for something. 

  • By analogy with a human brain, the part of a machine or computer that performs calculations. 

  • Oral sex. 

  • An intelligent person. 

  • Intellect. 

  • The control center of the central nervous system of an animal located in the skull which is responsible for perception, cognition, attention, memory, emotion, and action. 

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