caddy vs packing case

caddy

noun
  • A small box, can, or chest to keep things in. 

  • A movable tray or other mechanism for holding, securing, and transporting a removable component within a piece of equipment or machinery. 

  • One hired to assist another in playing the game of golf. 

  • A lightweight wheeled cart, often used to bring home groceries. 

verb
  • To serve as a caddy, carrying golf clubs etc. 

packing case

noun
  • A large, sturdy box or wooden crate used for the secure shipment of goods. 

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