adopt vs take up

adopt

verb
  • To select and take or approve. 

  • To take voluntarily (a child of other parents) to be in the place of, or as, one's own child. 

  • To take or receive as one's own what is not so naturally. 

  • To obtain (a pet) from a shelter or the wild. 

  • To take by choice into the scope of one's responsibility. 

  • To beat an opponent ten times in a row. 

take up

verb
  • To accept (a proposal, offer, request, etc.) from. 

  • To implement, to employ, to put into use. 

  • To review the solutions to a test or other assessment with a class. 

  • To begin doing (an activity) on a regular basis. 

  • To occupy; to consume (space or time). 

  • Synonym of take in (“tighten a belaying rope”) 

  • To resume. 

  • To pick up. 

  • To address (an issue). 

  • To shorten by hemming. 

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