bobber vs snorkel

bobber

noun
  • A buoyant device (frequently made of cork) attached to a line so as to suspend the end of the line with the hook (and bait or lure) above the bottom. 

  • A person who rides a bobsleigh; a bobsleigher. 

  • One who takes part in apple bobbing. 

  • A style of custom motorcycle with stripped-down bodywork and a shortened (or "bobbed") rear fender. 

snorkel

noun
  • A hollow tube, held in the mouth, or mounted on and opening into a diving mask, used by swimmers for breathing underwater. 

  • A snorkel parka. 

  • A retractable tube fitted in diesel-engine submarines to allow sufficient ventilation that the engines may be used at periscope depth. 

verb
  • To use a snorkel. 

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