lowliness vs mediocrity

lowliness

noun
  • The property of being lowly. 

mediocrity

noun
  • An individual with mediocre abilities or achievements. 

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

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