decor vs grace note

decor

noun
  • The style of decoration of a room or building. 

  • A stage setting; scenery; set; backdrop. 

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 decor and grace note occurred in a corpus of books? (source: Google Ngram Viewer )