crochet vs filigree

crochet

noun
  • Needlework made by looping thread with a hooked needle. 

  • A certain crest of enamel on the molar teeth of some rhinoceroses. 

verb
  • To make (a piece of) needlework using a hooked needle; to make interlocking loops of thread. 

filigree

noun
  • A delicate and intricate ornamentation made from platinum, gold or silver (or sometimes other metal) twisted wire. 

  • A design resembling such intricate ornamentation. 

verb
  • To decorate something with intricate ornamentation made from gold or silver twisted wire. 

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