doodle vs snorkel

doodle

verb
  • To drone like a bagpipe. 

  • To draw or scribble aimlessly. 

noun
  • Penis. 

  • Any crossbreed of a poodle with a different breed of dog. 

  • A small mindless sketch, etc. 

snorkel

verb
  • To use a snorkel. 

noun
  • A snorkel parka. 

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

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

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