ending vs finis

ending

noun
  • The last part of something. 

  • A termination or conclusion. 

  • The last morpheme of a word, added to some base to make an inflected form (such as -s in "dogs"). 

finis

noun
  • The end (of a book or other work). 

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