burl vs pretzel

burl

noun
  • A knot or lump in thread or cloth. 

  • 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. 

verb
  • To remove the knots in cloth. 

pretzel

noun
  • Anything that is knotted, twisted, or tangled. 

  • A toasted bread or cracker usually in the shape of a loose knot. 

verb
  • To bend, twist, or contort. 

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