caddy vs covering

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. 

covering

noun
  • That which covers or conceals; a cover; something spread or laid over or wrapped about another. 

  • Action of the verb to cover. 

  • A continuous map onto a topological space X, 𝜋:E→X, such that there exists a discrete space D and for every x∈X an open neighborhood U⊂X, such that 𝜋⁻¹(U)= displaystyle bigsqcup _(d∈D)V_d and 𝜋|_(V_d):V_d→U is a homeomorphism for every d∈D. 

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