deluge vs inner tube

deluge

noun
  • A system for flooding or drenching a space, container, or area with water in an emergency to prevent or extinguish a fire. 

  • A great flood or rain. 

  • An overwhelming amount of something; anything that overwhelms or causes great destruction. 

verb
  • To flood with water. 

  • To overwhelm. 

inner tube

noun
  • An inflatable rubber tube inserted into the casing of a pneumatic tyre/tire. 

  • Synonym of swim ring 

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