bushing vs shim

bushing

noun
  • 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. 

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

  • An adapter for joining pipes of different size. 

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

  • 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. 

shim

noun
  • A thin piece of material, sometimes tapered, used for alignment or support. 

  • A small library that transparently intercepts and modifies calls to an API, usually for compatibility purposes. 

  • A kind of shallow plow used in tillage to break the ground and clear it of weeds. 

  • A small metal device used to pick open a lock. 

  • A person characterised by both male and female traits, or by ambiguous male-female traits; a hermaphrodite. 

  • A wedge. 

  • A transsexual person, especially a trans woman; (loosely) a drag queen or transvestite. 

verb
  • To fit one or more shims to a piece of machinery. 

  • To adjust the homogeneity of a magnetic field, after the mechanical devices once used for the purpose. 

  • To adjust something by using shims. 

  • To intercept and modify calls to (an API), usually for compatibility purposes. 

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