alliance vs unifying

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. 

unifying

noun
  • unification 

adj
  • Tending to unify; promoting unity; uniting. 

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