culmination vs end of the line

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. 

end of the line

noun
  • The final cessation or discontinuance of a process, institution, or person, especially one which has existed for a considerable period of time; death. 

  • The termination point of a railway or similar transportation system. 

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