exposition vs memoir

exposition

noun
  • The act or process of declaring or describing something through either speech or writing; the portions and aspects of a piece of writing that exist mainly to describe the setting, characters and other non-plot elements. 

  • The abandonment of an unwanted child. 

  • An exhibition, especially of goods, artwork or cultural displays to the public. 

  • An essay or speech in which any topic is discussed in detail. 

  • An opening section in fiction, in which background information about the characters, events or setting is conveyed. 

  • The opening section of a movement in sonata form; the opening section of a fugue. 

  • The action of exposing something to something, such as skin to the sunlight. 

memoir

noun
  • Any form of narrative describing the personal experiences of a writer. 

  • A biography; a book describing the experiences of a subject from personal knowledge of the subject or from sources with personal knowledge of the subject. 

  • An autobiography; a book describing the personal experiences of an author. 

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