burl vs discord

burl

verb
  • To remove the knots in cloth. 

noun
  • Wood of a mottled veneer, usually cut from such a growth. 

  • A tree growth in which the grain has grown in a deformed manner; a burr knot. 

  • A knot or lump in thread or cloth. 

discord

verb
  • To untie things which are connected by a cord. 

noun
  • Any harsh noise, or confused mingling of sounds. 

  • Tension or strife resulting from a lack of agreement; dissension. 

  • An inharmonious combination of simultaneously sounded tones; a dissonance. 

  • Lack of concord, agreement or harmony. 

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