crown jewels vs yarbles

crown jewels

noun
  • The male genitalia. 

  • The jewelry that accompany the office of rulership in a monarchy, i.e. crown, scepter, signet ring, etc. 

yarbles

noun
  • Testicles. 

  • Nonsense; something of unacceptably poor quality. 

  • Courage, fortitude, or machismo. 

  • Information that is false or otherwise misleading. 

intj
  • Expressing disgust, annoyance, frustration, or disapproval. 

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