barf vs dry-heave

barf

verb
  • To vomit. 

  • Of a system: to fail. 

intj
  • An expression of disgust. 

noun
  • Vomit. 

dry-heave

verb
  • To attempt to vomit with the ejection of only gas. 

noun
  • An attempt to vomit that ejects only gas. 

How often have the words barf and dry-heave occurred in a corpus of books? (source: Google Ngram Viewer )