complexion vs mysteriousness

complexion

noun
  • The outward appearance of something. 

  • Outlook, attitude, or point of view. 

  • The quality, colour, or appearance of the skin on the face. 

  • An arrangement. 

verb
  • To give a colour to. 

mysteriousness

noun
  • The quality of being mysterious. 

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