anus vs love hole

anus

noun
  • The lower orifice of the alimentary canal, through which feces and flatus are ejected. 

  • An impolite, unpopular, or unintelligent person. 

love hole

noun
  • vagina 

  • anus 

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