mistake vs viewpoint

mistake

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. 

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

viewpoint

noun
  • The position from which something is observed or considered 

  • An angle, outlook or point of view. 

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