finale vs inception

finale

noun
  • The chronological conclusion of a series of narrative works. 

  • The grand end of something, especially a show or piece of music. 

inception

noun
  • A layering, nesting, or recursion of something. 

  • The creation or beginning of something; the establishment. 

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