sickness vs vomitus

sickness

noun
  • Nausea; qualmishness; as, sickness of stomach. 

  • The analogical misuse of a rarer or marked grammatical case in the place of a more common or unmarked case. 

  • The quality or state of being sick or diseased; illness. 

vomitus

noun
  • vomit, the product of an emesis. 

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