bethink vs waken

bethink

verb
  • To meditate, ponder; to consider. 

  • To determine, resolve. 

  • To think of (something or somebody) or that (followed by clause); to remind oneself, to consider, to reflect upon. 

waken

verb
  • To awaken; to cease to sleep; to be awakened; to stir. 

  • To wake or rouse from sleep. 

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