buckram vs ramsons

buckram

noun
  • A plant, Allium ursinum, also called ramson, wild garlic, or bear garlic. 

  • A coarse cloth of cotton, linen or hemp, stiffened with size or glue, used in bookbinding to cover and protect the books, in garments to keep them in the form intended, and for wrappers to cover merchandise. 

verb
  • To stiffen with or as if with buckram. 

ramsons

noun
  • A wild relative of chives, Allium ursinum, having edible leaves and roots. 

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