alliance vs breakup

alliance

noun
  • Marriage. 

  • The persons or parties allied. 

  • The state of being allied. 

  • The act of allying or uniting. 

  • 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. 

breakup

noun
  • The termination of a friendship or a romantic relationship. 

  • The act of breaking up; disintegration or division. 

  • The time of year during which winter ice covering bodies of water disintegrates; more generally, spring. 

  • A loss of emotional control; a breakdown. 

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