mammal vs scrote

mammal

noun
  • A vertebrate with three bones in the inner ear and one in the jaw. 

  • An animal of the class Mammalia, characterized by being warm-blooded, having hair and producing milk with which to feed its young. 

scrote

noun
  • The scrotum. 

  • A worthless or contemptible person; a gobshite or toerag. 

  • A stereotypical low-value and obnoxious man. 

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