confront vs take on

confront

verb
  • To engage in confrontation. 

  • To set a thing side by side with; to compare. 

  • To deal with. 

  • To put a thing facing to; to set in contrast to. 

  • To come up against; to encounter. 

  • To stand or meet facing, especially in competition, hostility or defiance; to come face to face with 

  • To bring someone face to face with something. 

take on

verb
  • To attempt to fight, compete with, or engage with. 

  • To assume or take responsibility for. 

  • To (attempt to) dribble round (an opposition player). 

  • To catch on, do well; to become popular. 

  • To obtain the services of (a person) in exchange for remuneration; to give someone a job. 

  • To begin to have or exhibit. 

  • To acquire, bring in, or introduce. 

  • To grieve or be concerned (about something or someone). 

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