caoutchouc vs galosh

caoutchouc

noun
  • latex; natural rubber 

galosh

noun
  • A waterproof rubber boot, intended to be worn in wet or muddy conditions. 

  • A waterproof overshoe used to provide protection from rain or snow. 

  • A gaiter, or legging, covering the upper part of the shoe and part of the leg. 

verb
  • To walk while wearing, or as if wearing, galoshes; to splash about. 

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