eventuate vs prove out

eventuate

verb
  • To have a given result; to turn out (well, badly etc.); to result in. 

  • To happen as a result; to come about. 

prove out

verb
  • To turn out to be feasible, accurate, true, satisfactory, as expected, hoped, stated, etc. 

  • To demonstrate the feasibility of; to show or be shown to be feasible, accurate, true, satisfactory, as expected, hoped, stated, etc. 

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