nethers vs pee-pee

nethers

noun

  • The private parts of the body, particularly the sex organs. 

pee-pee

noun

  • The penis or vulva; genitalia. 

  • Urine. 

verb

  • To urinate. 

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