awaken vs wake up

awaken

verb
  • To stop sleeping; awake. 

  • To cause to become aware. 

  • To call to a sense of sin. 

  • To cause to become awake. 

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

wake up

verb
  • To awake. 

  • To awaken somebody. 

  • To become more aware of a real-life situation; to concentrate on the matter in hand. 

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