go to sleep vs wake up

go to sleep

verb
  • To be affected by paresthesia; to go numb. 

  • To fall asleep. 

  • To die. 

wake up

verb
  • To awaken somebody. 

  • To awake. 

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

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