alliance vs collaboration

alliance

noun
  • The act of allying or uniting. 

  • Marriage. 

  • The persons or parties allied. 

  • The state of being allied. 

  • A union or connection of interests between families, states, parties, etc., especially between families by marriage and states by compact, treaty, or league. 

  • Any union resembling that of families or states; union by relationship in qualities; affinity. 

collaboration

noun
  • The act of collaborating. 

  • Treasonous cooperation. 

  • A production or creation made by collaborating. 

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