ending vs longevity

ending

noun
  • A termination or conclusion. 

  • The last part of something. 

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

longevity

noun
  • Duration over time; persistence. 

  • The quality of being long-lasting, especially of life. 

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