archive vs memoir

archive

noun
  • Natural deposits of material, regarded as a record of environmental changes over time. 

  • The material so kept, considered as a whole (compare archives). 

  • A place for storing earlier, and often historical, material. An archive usually contains documents (letters, records, newspapers, etc.) or other types of media kept for historical interest. 

verb
  • To put (something) into an archive. 

memoir

noun
  • 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. 

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

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

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