cooperation vs mischief

cooperation

noun
  • The act of cooperating. 

  • Association for mutual benefit, such as for purposes of production or purchase. 

  • Active help from a person, organization, etc., such as an orderly sharing of space or resources. 

mischief

noun
  • Casual and/or flirtatious sexual acts. 

  • A playfully annoying action. 

  • A group or a pack of rats. 

  • A criminal offence defined in various ways in various jurisdictions, sometimes including causing damage to another's property. 

  • Conduct that playfully causes petty annoyance. 

  • The Devil; used as an expletive. 

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