folderol vs grace note

folderol

noun
  • A decorative object of little value; a trifle or gewgaw. 

  • Nonsense or foolishness. 

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