boo-boo vs mistake

boo-boo

noun
  • A mistake or error. 

  • Feces. 

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

verb
  • To defecate. 

  • To make a mistake. 

mistake

noun
  • An error; a blunder. 

  • A pitch which was intended to be pitched in a hard-to-hit location, but instead ends up in an easy-to-hit place. 

verb
  • To understand wrongly, taking one thing or person for another. 

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