eventual vs final curtain

eventual

adj
  • Finally resulting or occurring (after a period of time); inevitable. 

  • Possible, potential. 

  • Pertaining to events; event-related, evential. 

final curtain

noun
  • The last time the curtain is lowered, after a performance and any curtain calls. 

  • The end to something that has lasted for a long time. 

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