billhook vs carving knife

billhook

noun
  • An agricultural implement often with a curved or hooked end to the blade used for pruning or cutting thick, woody plants. 

  • Written as bill hook: a sharply pointed spike growing from the tip of the upper mandible of the hatchlings of honeyguides, used to destroy the eggs and kill the chicks of the host species. 

  • Written as bill-hook: a part of the knotting mechanism in a reaper-binder or baler (agricultural machinery). 

  • Written as bill hook: a spiked hook used in offices and shops for hanging bills or other small papers such as receipts. 

  • A medieval polearm, fitted to a long handle, sometimes with an L-shaped tine or a spike protruding from the side or the end of the blade for tackling the opponent; a bill 

verb
  • To use a billhook 

carving knife

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

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

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