drop in the bucket vs triviality

drop in the bucket

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

triviality

noun
  • Something which is trivial or unimportant. 

  • The quality of being trivial or unimportant. 

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