pooper vs tradesman's entrance

pooper

noun
  • The anus; often in reference to anal intercourse. 

  • A selection in a slot machine game that ends the picking bonus. 

  • One who poops; or, poops well. 

  • An infant. 

  • One who poops out on an activity; one who dampens the mood by lack of participation or negative attitude. 

  • The toilet. 

tradesman's entrance

noun
  • The anus. 

  • The entrance to a large house, used by tradesmen to deliver goods and services; usually at the side or rear. 

How often have the words pooper and tradesman's entrance occurred in a corpus of books? (source: Google Ngram Viewer )