chewable vs tough

chewable

adj
  • Capable of being chewed. 

  • Allowing for a particular type of bid that does not trigger the flip-in. 

  • Chewy. 

noun
  • A medicine supplied in a form that can be chewed. 

  • Anything that is chewable; anything that is able to be chewed. 

tough

intj
  • Used to indicate lack of sympathy 

verb
  • To endure. 

  • To toughen. 

noun
  • A person who obtains things by force; a thug or bully. 

adj
  • Harsh or severe. 

  • Difficult or demanding. 

  • Stubborn or persistent; capable of stubbornness or persistence. 

  • Strong and resilient; sturdy. 

  • Undergoing plastic deformation before breaking. 

  • Difficult to cut or chew. 

  • Rugged or physically hardy. 

  • Rowdy or rough. 

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