awaken vs key up

awaken

verb
  • To bring into action (something previously dormant); to stimulate. 

  • To cause to become aware. 

  • To call to a sense of sin. 

  • To cause to become awake. 

  • To stop sleeping; awake. 

key up

verb
  • To raise the intensity, excitement, tension, etc., of. 

  • To produce nervous tension in. 

  • To raise the pitch of. 

  • To raise (the whole ring of an arch) off its centering, by driving in the keystone forcibly. 

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