buckram vs ramson

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. 

ramson

noun
  • A plant, Allium ursinum, a wild relative of chives and garlic. 

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