pooper vs portajohn

pooper

noun
  • The toilet. 

  • 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 anus; often in reference to anal intercourse. 

portajohn

noun
  • A portable restroom. 

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