Roger vs pee-pee

Roger

name

  • A male given name from the Germanic languages. 

  • A surname originating as a patronymic. 

  • Jolly Roger (pirate flag) 

pee-pee

verb

  • To urinate. 

noun

  • The penis or vulva; genitalia. 

  • Urine. 

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