boo-boo vs pinch one off

boo-boo

verb
  • To defecate. 

  • To make a mistake. 

noun
  • Feces. 

  • A minor injury, such as a cut or a bruise. 

  • A mistake or error. 

pinch one off

verb
  • To defecate. 

How often have the words boo-boo and pinch one off occurred in a corpus of books? (source: Google Ngram Viewer )