Shetland lace vs bobbinet

Shetland lace

noun
  • An openwork ornamental trimming made with woolen yarn for shawls, etc. 

bobbinet

noun
  • A net fabric, with hexagonal mesh, woven by machine. 

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