canto vs potpourri

canto

noun
  • The treble or leading melody. 

  • One of the chief divisions of a long poem; a book. 

  • The designated division of a song. 

potpourri

noun
  • A medley of songs or music. 

  • A ragout or stew of meat and vegetables. 

  • An anthology of miscellaneous prose. 

  • A mixture of dried fragrant plant material, often in a decorative bowl, used to scent a room. 

  • A collection of various things; an assortment, mixed bag or motley. 

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