decoration vs plainness

decoration

noun
  • Specifically, any mark of honor to be worn upon the person, as a medal, cross, or ribbon of an order of knighthood, bestowed for services in war, great achievements in literature, art, etc. 

  • The use of exotic sugars as decoys to distract the immune system of a host 

  • Any item that adorns, enriches, or beautifies; something added by way of embellishment or ornamentation. 

  • The act of adorning, embellishing, or honoring; ornamentation. 

plainness

noun
  • The product or result of being plain 

  • The condition of being plain (in all senses) 

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