betterness vs greatness

betterness

noun
  • The state or quality of being better; superiority. 

  • The result or product of being better. 

  • The amount by which a precious metal exceeds the standard of fineness. 

greatness

noun
  • The state, condition, or quality of being great 

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