mistake vs unreason

mistake

verb
  • To understand wrongly, taking one thing or person for another. 

noun
  • An error; a blunder. 

  • A pitch which was intended to be pitched in a hard-to-hit location, but instead ends up in an easy-to-hit place. 

unreason

verb
  • To make unreasonable; to deprive of reason. 

  • To prove to be unreasonable; disprove by argument. 

  • To apply false logic or think without logic. 

noun
  • Nonsense; folly; absurdity. 

  • Lack of reason or rationality; unreasonableness; irrationality. 

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