question vs ventilation

question

noun
  • A proposal to a meeting as a topic for deliberation. 

  • A subject or topic for consideration or investigation. 

  • A sentence, phrase or word which asks for information, reply or response; an interrogative. 

  • A doubt or challenge about the truth, accuracy, or validity of a matter. 

verb
  • To ask a question or questions; inquire or seek to know; examine. 

  • To ask questions of; to interrogate; to ask for information. 

  • To raise doubts about; have doubts about. 

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 question and ventilation occurred in a corpus of books? (source: Google Ngram Viewer )