collusive vs cooperative

collusive

adj
  • secretly acting together for a fraudulent or illegal purpose 

cooperative

adj
  • Involving cooperation between individuals or parties. 

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

  • Relating to a cooperative or cooperatives. 

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

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