society vs trade union

society

noun
  • A group of people who meet from time to time to engage in a common interest; an association or organization. 

  • A long-standing group of people sharing cultural aspects such as language, dress, norms of behavior and artistic forms. 

  • The sum total of all voluntary interrelations between individuals. 

  • High society. 

  • The people of one’s country or community taken as a whole. 

  • A number of people joined by mutual consent to deliberate, determine and act toward a common goal. 

trade union

noun
  • An organization whose members belong to the same trade and that acts collectively to address common issues. 

  • labour union (Canada), labor union (North America) 

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