cooperative vs hardened

cooperative

adj
  • Ready to work with another person or in a team; ready to cooperate. 

  • Involving cooperation between individuals or parties. 

  • Relating to a cooperative or cooperatives. 

noun
  • A type of company that is owned partially or wholly by its employees, customers or tenants. 

hardened

adj
  • Firmly established or unlikely to change; inveterate. 

  • Inured; toughened. 

  • Having extra defences against attack; highly fortified. 

  • Unfeeling; pitiless; callous. 

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