pooper vs rectum

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. 

rectum

noun
  • The terminal part of the large intestine through which feces pass after exiting the colon, but before leaving the body through the anus. 

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