quiet vs undertaking

quiet

verb
  • To become quiet or calm. 

  • To cause (someone or something) to become 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. 

undertaking

noun
  • A promise or pledge; a guarantee. 

  • That which is undertaken; any business, work, or project which a person engages in, or attempts to perform; an enterprise. 

  • The business of an undertaker, or the management of funerals. 

  • The act of one who undertakes (in either sense). 

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