cocksack vs coin purse

cocksack

noun
  • Clothing that covers the scrotum in a manner similar to a codpiece. 

  • The scrotum. 

  • A term of abuse. 

coin purse

noun
  • A small bag or pouch designed for carrying money, particularly coins. 

  • Testicles. 

  • a type of theatrical performance undergarment used to hide male genitalia, by stuffing it into a pouch with a drawstring, to simulate being nude 

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