buckram vs protrude

buckram

verb
  • To stiffen with or as if with buckram. 

noun
  • 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. 

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

protrude

verb
  • To extend from, above or beyond a surface or boundary; to bulge outward; to stick out. 

  • To thrust out, as through a narrow orifice or from confinement; to cause to come forth. 

  • To cause to extend from a surface or boundary; to cause to stick out. 

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