liberality vs mercifulness

liberality

noun
  • The property of being liberal; generosity; charity. 

  • A gift; a gratuity. 

  • Impartiality. 

  • Candor. 

mercifulness

noun
  • The state of being merciful; mercy. 

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