greatness vs mediocrity

greatness

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

mediocrity

noun
  • The condition of being mediocre; having only an average degree of quality, skills etc.; no better than standard. 

  • An individual with mediocre abilities or achievements. 

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