carving knife vs polearm

carving knife

noun
  • A knife used to pare, cut, and smooth wood. 

  • A large knife designed for cutting cooked turkey and similar dishes. 

polearm

noun
  • A close-quarter combat weapon with the main fighting part of the weapon placed on the end of a long shaft, typically of wood. 

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