departing vs playthrough

departing

noun
  • The act by which somebody or something departs. 

adj
  • while leaving 

  • that is leaving 

playthrough

noun
  • The act, or a recording, of playing a game from start to finish. 

  • The cumulative monetary amount that must be wagered before an account may be withdrawn, typically stated as a multiple of the initial deposit. 

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