free grace vs generosity

free grace

noun
  • A concept of grace as a gift given freely by God, without regard to entitlement or merit. 

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 free grace and generosity occurred in a corpus of books? (source: Google Ngram Viewer )