filigree vs lacework

filigree

noun
  • A design resembling such intricate ornamentation. 

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

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

lacework

noun
  • A piece or example of lace. 

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