air cushion vs snubber

air cushion

noun
  • A shock absorber that uses an air chamber. 

  • A layer of trapped air that supports a hovercraft. 

  • A rubber or plastic inflatable cushion. 

snubber

noun
  • A device used to suppress ("snub") voltage transients in electrical systems, pressure transients in fluid systems, or excess force or rapid movement in mechanical systems. 

  • One who snubs. 

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