poniard vs puukko

poniard

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

verb
  • To stab with a poniard. 

puukko

noun
  • A type of sharp, pointed knife of Nordic heritage, with a short blade and flat back; normally worn in a sheath on the waist, and used for woodcrafts and as hunting knife. 

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