carving knife vs folder

carving knife

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

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

folder

noun
  • A folding knife, typically a pocketknife. 

  • An organizer that papers are kept in, usually with an index tab, to be stored as a single unit in a filing cabinet. 

  • A virtual container in a computer's file system, in which files and other folders may be stored. The files and subfolders in a folder are usually related. 

  • A machine or person that folds things. 

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