hooker vs side chick

hooker

noun
  • A prostitute. 

  • One who, or that which, hooks. 

  • A batsman or batswoman adept at or fond of playing hook shots. 

  • A crocheter. 

  • Any antiquated craft. 

  • A player who hooks the ball out of the scrum with his foot. 

  • A small fishing boat. 

side chick

noun
  • A mistress; a woman one dates in addition to one's girlfriend or wife, usually in secret. 

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