POST vs prove out

POST

verb
  • To successfully perform a power-on self-test. 

noun
  • An HTTP request method used to send an arbitrary amount of data to a web server. 

prove out

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

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

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