conversation vs ventilation

conversation

noun
  • Expression and exchange of individual ideas through talking with other people; also, a set instance or occasion of such talking. 

  • The protocol-based interaction between systems processing a transaction. 

  • The back-and-forth play of the blades in a bout. 

verb
  • To engage in conversation (with). 

ventilation

noun
  • An exchange of views during a discussion. 

  • The bodily process of breathing; the inhalation of air to provide oxygen, and the exhalation of spent air to remove carbon dioxide. 

  • The mechanical system used to assist breathing. 

  • The replacement of stale or noxious air with fresh. 

  • The public exposure of an issue or topic. 

  • The mechanical system used to circulate and replace air. 

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