autography vs chicken scratch

autography

noun
  • Writing in one's own handwriting. 

  • A process in lithography by which a writing or drawing is transferred from paper to stone. 

  • An autobiography. 

chicken scratch

noun
  • Cramped or illegible handwriting. 

  • Chicken feed consisting of random mixed grains such as corn, wheat, barley, sorghum and milling by-products. 

  • A type of cross-stitch embroidery done on gingham fabric. 

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