magnanimity vs unselfishness

magnanimity

noun
  • 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. 

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

unselfishness

noun
  • The state of being unselfish. 

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