go to the toilet vs piss

go to the toilet

verb
  • Synonym of use the toilet: to urinate or defecate, especially (but not exclusively) while visiting a toilet. 

piss

verb
  • To urinate. 

  • To rain heavily. 

  • To discharge as or with the urine. 

  • To achieve easily. 

noun
  • The act of urinating. 

  • Urine. 

  • An intensifier. 

  • Alcoholic beverage, especially of inferior quality. 

intj
  • Expresses anger, disappointment or dissatisfaction. 

How often have the words go to the toilet and piss occurred in a corpus of books? (source: Google Ngram Viewer )