chippy vs side piece

chippy

noun
  • A prostitute or promiscuous woman. 

  • A carpenter. 

  • A fish-and-chip shop. 

  • A potato chip. 

  • A chipping sparrow. 

  • A chiptune. 

  • An occasional drug habit, less than addiction. 

  • The youngest member of a team or group, normally someone whose voice has not yet deepened, talking like a chipmunk. 

adj
  • Tending to form chips when cut, rather than larger, more usable pieces of wood. 

  • Ill-tempered, disagreeable. 

  • Involving violence or unfair play. 

verb
  • To take drugs (especially heroin) on an occasional basis, rather than as an addict. 

side piece

noun
  • A mistress; a woman with whom a man carries on a physical affair (not emotional affair) without having the intention of forming a serious relationship. 

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