cartel vs separation

cartel

noun
  • A group of businesses or nations that collude to limit competition within an industry or market. 

  • A ship used to negotiate with an enemy in time of war, and to exchange prisoners. 

  • An official agreement concerning the exchange of prisoners. 

  • A written letter of defiance or challenge. 

  • A combination of political groups (notably parties) for common action. 

separation

noun
  • Departure from active duty, while not necessarily leaving the service entirely. 

  • An agreement legalizing such an arrangement. 

  • An object that separates two spaces. 

  • The act of disuniting two or more things, or the condition of being separated. 

  • The act or condition of two or more people being separated from one another. 

  • The place at which a division occurs. 

  • An interval, gap or space that separates things or people. 

  • The act or condition of a married couple living in separate homes while remaining legally married. 

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