drop in the bucket vs generosity

drop in the bucket

noun
  • Something of little importance, especially an inconsequential effort or action as compared to a huge problem. 

generosity

noun
  • A generous act. 

  • The trait of being abundant, more than adequate. 

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

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