quiet vs ventilation

quiet

noun
  • The absence of sound; quietness. 

  • The absence of movement; stillness, tranquility. 

  • The absence of disturbance or trouble; peace, security. 

intj
  • Be quiet. 

adj
  • Not busy, of low quantity. 

  • Not talking much or not talking loudly; reserved. 

  • With little or no sound; free of disturbing noise. 

  • Not showy; undemonstrative. 

  • Requiring little or no interaction. 

  • Having little motion or activity; calm. 

verb
  • To become quiet or calm. 

  • To cause (someone or something) to become quiet. 

ventilation

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

  • An exchange of views during a discussion. 

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