chaw vs chewing

chaw

noun
  • Chewing tobacco. 

  • A plug or wad of chewing tobacco. 

verb
  • To steal. 

  • To chew; to grind with one's teeth; to masticate (food, or the cud) 

chewing

noun
  • The consumption of loose leaf tobacco juice from tobacco plants by chewing leaves near the cheek. 

  • The act by which something is chewed on; mastication. 

  • The consumption of (the juice from) the khat plant. 

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