bibcock vs bushing

bibcock

noun
  • An appliance (typically a valve with a threaded outlet) allowing the provision of hose connections outside of buildings. 

bushing

noun
  • An adapter for joining pipes of different size. 

  • A threaded bushing: a fastener element that is inserted into an object, usually to add a threaded hole in a softer or thin material. 

  • A lining for an opening through which a conductor passes, providing insulation and mechanical protection for the conductor. 

  • A type of bearing, a cylindrical lining designed to reduce friction and wear inside a hole, often used as a casing for a shaft, pin or hinge. 

  • An elastic bearing used as a type of vibration isolator, commonly made of rubber. An interface between two parts, damping the movement and the energy transmitted. 

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