drop in the bucket vs minutia

drop in the bucket

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

minutia

noun
  • A minor detail, often of negligible importance. 

  • Any of the point features on fingerprints used for matching, usually endings and bifurcations of ridges. 

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