poniard vs whittle

poniard

noun
  • A dagger typically having a slender square or triangular blade. 

verb
  • To stab with a poniard. 

whittle

noun
  • A knife; especially, a pocket knife, sheath knife, or clasp knife. 

verb
  • To cut or shape wood with a knife. 

  • To reduce or gradually eliminate something (such as a debt). 

  • To make eager or excited; to excite with liquor; to inebriate. 

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