altruism vs generosity

altruism

noun
  • Regard for others, both natural and moral without regard for oneself; devotion to the interests of others; brotherly kindness. 

  • Action or behaviour that benefits another or others at some cost to the performer. 

generosity

noun
  • The trait of being willing to donate money, time or resources. 

  • A generous act. 

  • The trait of being abundant, more than adequate. 

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