disapprove vs key up

disapprove

verb
  • To have or express an unfavorable opinion. 

  • To condemn; to consider wrong or inappropriate; used with of. 

  • She disapproves of rap music because of its sometimes aggressive lyrics. 

  • To refuse to approve; reject. 

key up

verb
  • To produce nervous tension in. 

  • To raise the pitch of. 

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

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

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