buckram vs wild garlic

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. 

wild garlic

noun
  • ramsons (Allium ursinum) 

  • Allium vineale 

  • Allium canadense 

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