afghan vs eiderdown

afghan

noun
  • A blanket or throw, usually crocheted or knitted. 

  • A type of iced chocolate biscuit, sometimes containing cornflakes and topped with a walnut. 

eiderdown

noun
  • A quilt stuffed with this down. 

  • The down of the eider duck, used for stuffing pillows and quilts. 

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