autobiography vs novelette

autobiography

noun
  • Biographies of this kind regarded as a literary genre. 

  • A self-written biography; the story of one's own life. 

novelette

noun
  • A short novel. 

  • A short piece of lyrical music, especially one for the piano. 

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