childe vs crotch critter

childe

noun
  • A child of noble birth. 

  • The cognomen given to the oldest son prior to his taking his father's title. 

crotch critter

noun
  • A child. 

  • A sexually transmitted pathogen, particularly pubic lice. 

How often have the words childe and crotch critter occurred in a corpus of books? (source: Google Ngram Viewer )