bolk vs ventosity

bolk

verb
  • To belch out; give vent to; ejaculate. 

  • To vomit; retch. 

  • To heave. 

  • To belch. 

  • To gush out. 

ventosity

noun
  • The quality or state of being ventose; windiness. 

  • vainglory; pride. 

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