hosepipe vs water main

hosepipe

noun
  • A flexible pipe for carrying water or other liquids; a garden hose. 

verb
  • To film with erratic panning movements of the camera. 

water main

noun
  • The principal pipe, usually underground, for conveying water to residential and business properties. 

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