flee vs make off

flee

verb
  • To run away; to escape. 

  • To escape from. 

  • To disappear quickly; to vanish. 

make off

verb
  • To exit or depart; to run away. 

  • To tie off, fix down or terminate the end of a rope, cable or thread. 

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