drop in the bucket vs pointlessness

drop in the bucket

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

pointlessness

noun
  • The lack of meaning, purpose, or ideas; the characteristic or condition of being pointless. 

  • The quality of not mentioning points. 

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