choad vs perineum

choad

noun
  • The perineum. 

  • A penis, especially one that is short and thick. 

  • A loser or undesirable person; an insulting name. 

perineum

noun
  • The region between the human genitalia, especially the scrotum, and anus. The male perineum is between the scrotum and anus. The female perineum is between the vagina and anus. 

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