aqueduct vs conduit

aqueduct

noun
  • An artificial channel that is constructed to convey water from one location to another. 

  • A structure carrying water over a river or depression, especially in regards to ancient aqueducts. 

  • A structure conveying fluid, such as the cerebral aqueduct or vestibular aqueduct. 

conduit

noun
  • A pipe or channel for conveying water, etc. 

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

  • 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 aqueduct and conduit occurred in a corpus of books? (source: Google Ngram Viewer )