micro vs nugatory

micro

adj
  • Small, relatively small; used to contrast levels of the noun modified. 

verb
  • to micromanage 

noun
  • a very small person 

  • micromanagement 

nugatory

adj
  • Trivial, trifling or of little importance. 

  • Having no force, inoperative, ineffectual. 

  • Removable from a computer program with safety, but harmless if retained. 

  • Ineffective, invalid or futile. 

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