chromo vs side bitch

chromo

noun
  • A prostitute. 

  • A color print produced by chromolithography. 

adj
  • Of or relating to the chromodomain, a protein structural domain associated with chromatin production 

side bitch

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

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