duologue vs gassing

duologue

noun
  • A conversation between two persons; dialogue. 

  • A dramatic performance or piece in the form of a dialogue limited to two speakers. 

gassing

noun
  • boasting; insincere or empty talk 

  • Any similar process of singeing. 

  • The process of passing cotton goods between two rollers and exposing them to numerous minute jets of gas to burn off the small fibres. 

  • Poisoning by noxious gas. 

  • The liberation of hydrogen from an overcharged battery due to electrolysis of the electrolyte. 

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