air ship vs blimp

air ship

verb
  • To transport (goods) by air. 

blimp

verb
  • To fit (a video camera) with a soundproof cover. 

  • To expand like a blimp or balloon; to become fat. 

noun
  • Any large airborne inflatable. 

  • A person similar to the cartoon character Colonel Blimp; a pompous, reactionary British man. 

  • A soundproof cover for a video camera. 

  • An airship constructed with a non-rigid lifting agent container. 

  • An obese person. 

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