caddy vs casing

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. 

casing

noun
  • The decorative trim around a door or window. 

  • That which encloses or encases. 

  • A metal pipe used to line the borehole of a well. 

  • The state of letter case across a whole phrase or whole lines of text; the collective state/arrangement of uppercase and lowercase letters. 

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