call of nature vs pee

call of nature

noun
  • The bodily urge to urinate or defecate. 

pee

noun
  • An act of urination. 

  • The sliding weight on a steelyard. 

  • Urine. 

  • The name of the Latin-script letter P. 

  • Pence; penny (a quantity of money) 

  • The bill of an anchor. 

verb
  • To drizzle. 

  • To urinate. 

  • To urinate on oneself. 

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