appoint vs enroll

appoint

verb
  • To equip (someone) with (something); to assign (someone) authoritatively (some equipment). 

  • To name (someone to a post or role). 

  • To set, fix or determine (a time or place for something such as a meeting, or the meeting itself) by authority or agreement. 

  • To fix the disposition of (property) by designating someone to take use of (it). 

  • To furnish or equip (a place) completely; to provide with all the equipment or furnishings necessary; to fit out. 

enroll

verb
  • To enlist (someone) or make (someone) a member of 

  • To enlist oneself (in something) or become a member (of something) 

  • To enter (a name, etc.) in a register, roll or list 

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