anecdote vs biography

anecdote

verb
  • To tell anecdotes (about). 

noun
  • A previously untold secret account of an incident. 

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

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

biography

verb
  • To write a biography of. 

noun
  • The art of writing this kind of story. 

  • A person's life story, especially one published. 

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