inflatable vs rubber duck

inflatable

noun
  • A boat or dinghy that may be inflated when needed. 

  • Any other structure, artwork etc. that is inflated. 

adj
  • Able to be inflated or blown up. 

rubber duck

noun
  • An inflatable boat. 

  • A toy, made from rubber or rubber-like plastic, shaped like a duck; usually a floating bathtub toy. 

verb
  • To act as a sounding board for a programmer that is debugging their code, facilitating rubber duck debugging. 

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