key up vs urge

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. 

urge

verb
  • To provoke; to exasperate. 

  • To press; to push; to drive; to impel; to force onward. 

  • To present in an urgent manner; to insist upon. 

  • To put mental pressure on; to ply with motives, arguments, persuasion, or importunity. 

  • To press onward or forward. 

  • To be pressing in argument; to insist; to persist. 

  • To press hard upon; to follow closely. 

noun
  • A strong desire; an itch to do something. 

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