cable television vs duct

cable television

noun
  • Television received through coaxial cables; specifically, a TV service that provides reception to suburbs or other residential areas through utility lines and offering a wide variety of TV channels through satellite reception. 

duct

noun
  • an enclosure or channel for electrical cable runs, telephone cables, or other conductors 

  • a vessel for conveying lymph or glandular secretions such as tears or bile 

  • a tube or elongated cavity (such as a xylem vessel) for conveying water, sap, or air 

  • a pipe, tube or canal which carries gas or liquid from one place to another 

  • a layer (as in the atmosphere or the ocean) which occurs under usually abnormal conditions and in which radio or sound waves are confined to a restricted path 

verb
  • to enclose in a duct 

  • to channel something (such as a gas) or propagate something (such as radio waves) through a duct or series of ducts 

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