plexus vs trelliswork

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. 

trelliswork

noun
  • A trellis or trellis-like structure. 

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