dagger vs pocketknife

dagger

noun
  • A stabbing weapon, similar to a sword but with a short, double-edged blade. 

  • The text character †; the obelus. 

  • A timber placed diagonally in a ship's frame. 

  • A point scored near the end of the game (clutch time) to take or increase the scorer's team lead, so that they are likely to win. 

verb
  • To pierce with a dagger; to stab. 

pocketknife

noun
  • A knife with blades or tools that the user can fold or retract into its handle, and of a size small enough for carrying safely and handily in a pocket, especially when suited to heavier duty uses or ad hoc applications outdoors or in workshops. 

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