renounce vs take on

renounce

verb
  • To make a renunciation of something. 

  • To cast off, repudiate. 

  • To abandon, forsake, discontinue (an action, habit, intention, etc), sometimes by open declaration. 

  • To fail to follow suit; playing a card of a different suit when having no card of the suit led. 

  • To give up, resign, surrender. 

  • To surrender formally some right or trust. 

  • To decline further association with someone or something, disown. 

noun
  • An act of renouncing. 

take on

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

  • To acquire, bring in, or introduce. 

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

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