breather vs snorkel

breather

noun
  • An air inlet path to the crankcase 

  • A short break; a rest or respite. 

  • A spatially localized, time-periodic excitation in a one-dimensional lattice. 

  • Something or someone that breathes. 

  • A heavy breather. 

snorkel

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

  • A snorkel parka. 

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

verb
  • To use a snorkel. 

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