contumacious vs unhelpful

contumacious

adj
  • Contemptuous of authority; willfully disobedient; rebellious. 

  • Willfully disobedient to the summons or orders of a court. 

unhelpful

adj
  • Not providing help or assistance; not helpful. 

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