conducting wire vs conduit

conducting wire

noun
  • Any metal wire used to carry electricity over a short or long distance. 

conduit

noun
  • A duct or tube into which electrical cables may be pulled; a type of raceway. 

  • A pipe or channel for conveying water, etc. 

  • A means by which something is transmitted. 

  • An investment vehicle that issues short-term commercial paper to finance long-term off-balance sheet bank assets. 

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