bedpan vs johnny

bedpan

noun
  • A pan used for urination and defecation while in bed, now usually for reasons of medical necessity or convenience. 

johnny

noun
  • A condom. 

  • An inexperienced new worker, usually an immigrant. 

  • A hospital gown: a gown with a back opening closed with snaps or ties, worn by hospital patients. 

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