emetic vs vomitorium

emetic

noun
  • An agent that induces vomiting. 

adj
  • Causing nausea and vomiting. 

vomitorium

noun
  • An area in which vomiting takes place, in particular a chamber supposedly used by ancient Romans to vomit during a feast so they could continue eating. 

  • A passage located behind a tier of seats in an amphitheatre used as an exit for the crowds 

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