filigree vs plexus

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. 

plexus

noun
  • An interwoven combination of parts or elements in a structure or system. 

  • The system of equations required for the complete expression of the relations which exist between a set of quantities. 

  • A network of anastomosing or interwoven nerves, blood vessels, or lymphatic vessels. 

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