perform vs realize

perform

verb
  • To behave theatrically so as to give the impression of (a quality, character trait, etc.); to feign. 

  • To fulfill contractually agreed-to terms. 

  • To exhibit an expected pattern of behavior; to function; to work. 

  • To act in accordance with (a contract); to fulfill one’s terms of (a contract). 

  • To do (something); to execute. 

  • To do (something) in front of an audience, such as acting or music, often in order to entertain. 

  • To behave in accordance with, and thereby in turn shape, (a social notion or role). 

  • To behave in ways that carry meaning in social contexts. 

realize

verb
  • To sense vividly or strongly; to make one's own in thought or experience. 

  • To become aware of (a fact or situation, especially of something that has been true for a long time). 

  • To cause to seem real to other people. 

  • To turn an abstract linguistic object into actual language, especially said of a phoneme's conversion into speech sound. 

  • To make real; to convert from the imaginary or fictitious into reality; to bring into real existence 

  • To acquire as an actual possession; to obtain as the result of plans and efforts; to gain; to get 

  • To convert any kind of property into money, especially property representing investments, such as shares, bonds, etc. 

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