decoration vs grace note

decoration

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

  • 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 

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

grace note

noun
  • Something that decorates, embellishes, or ornaments; a finishing touch. 

  • A musical note, indicated on a score in smaller type with or without a slash through it, played to ornament the melody rather than as part of it. Its note value does not count as part of the total time value of the measure it appears in. 

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