frills vs purfling

frills

purfling

noun
  • Two or more very narrow strips of black wood enclosing a lighter-coloured strip of wood set close to the edge of the top and back of a string instrument such as a violin, cello or a guitar, following its outline, or this effect simulated with paint. 

  • An ornament consisting of a bordure of ermines, furs, etc. or gold studs or mountings. 

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