boo-boo vs doo-doo

boo-boo

noun
  • Feces. 

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

  • A mistake or error. 

verb
  • To defecate. 

  • To make a mistake. 

doo-doo

noun
  • Excrement. 

  • Difficulty; trouble. 

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