magnanimity vs mercifulness

magnanimity

noun
  • The quality of being magnanimous; greatness of mind; elevation or dignity of soul. 

  • That quality or combination of qualities, in character, which enables one to encounter danger and trouble with tranquility and firmness, to disdain injustice, meanness and revenge, and to act and sacrifice for noble objectives. 

mercifulness

noun
  • The state of being merciful; mercy. 

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