cooperative vs rigid

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. 

rigid

adj
  • Fixed, rather than moving. 

  • Stiff, rather than flexible. 

  • Uncompromising. 

  • Rigorous and unbending. 

noun
  • An airship whose shape is maintained solely by an internal and/or external rigid structural framework, without using internal gas pressure to stiffen the vehicle (the lifting gas is at atmospheric pressure); typically also equipped with multiple redundant gasbags, unlike other types of airship. 

  • A bicycle with no suspension system. 

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