conclusion vs sequel

conclusion

noun
  • The end, finish, close or last part of something. 

  • The end or close of a pleading, for example, the formal ending of an indictment, "against the peace", etc. 

  • The outcome or result of a process or act. 

  • In an argument or syllogism, the proposition that follows as a necessary consequence of the premises. 

  • A decision reached after careful thought. 

  • An estoppel or bar by which a person is held to a particular position. 

sequel

noun
  • The remainder of the text; what follows. Used exclusively in the set phrase "in the sequel". 

  • A narrative that is written after another narrative set in the same universe, especially a narrative that is chronologically set after its predecessors, or (perhaps improper usage) any narrative that has a preceding narrative of its own. 

  • Thirlage. 

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