openwork vs rete

openwork

noun
  • Any of several forms of metalwork or needlework having decorative openings. 

  • A quarry; an open cut. 

rete

noun
  • An anatomical part resembling or including a network. 

  • A rotating cutaway plate or overlay on an astrolabe or starmap which represents the horizon; used to locate stars and other astronomical features. 

  • A network of blood vessels or nerves. 

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