outlook vs perspicuousness

outlook

noun
  • look; appearance 

  • Expectation for the future. 

  • A place from which something can be viewed. 

  • An attitude or point of view. 

  • The view from such a place. 

perspicuousness

noun
  • The state or characteristic of being perspicuous; perspicuity. 

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