bungee vs safety belt

bungee

noun
  • An elastic fabric-bound strap with a hook at each end, used for securing luggage. 

  • An elastic cord tied to the ankles of the jumper in bungee jumping. 

  • A rubber eraser. 

verb
  • To bungee jump 

safety belt

noun
  • A belt or strap that attaches a person to an immovable object for safety. 

  • A seat belt. 

  • A life belt. 

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