culmination vs expiration

culmination

noun
  • Endpoint (usually good) arrived at after some series of actions or events, or some period , usually after the series or period has ended. The sum of something. 

  • The attainment of the highest point of altitude reached by a heavenly body; passage across the meridian; transit. 

  • A ceremony marking the completion of studies at an elementary school, middle school or junior high school, the term "graduation" being reserved for high school. 

  • Attainment or arrival at the highest pitch of glory, power, etc. 

expiration

noun
  • The act of expiring. 

  • That which is produced by breathing out, as a sound. 

  • A cessation, extinction, ending 

  • Emission of volatile matter; exhalation. 

  • The last emission of breath; death. 

  • The act or process of breathing out, or forcing air from the lungs through the nose or mouth 

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