anecdote vs memoir

anecdote

noun
  • A short account of a real incident or person, often humorous or interesting. 

  • A previously untold secret account of an incident. 

  • An account which supports an argument, but which is not supported by scientific or statistical analysis. 

verb
  • To tell anecdotes (about). 

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 anecdote and memoir occurred in a corpus of books? (source: Google Ngram Viewer )