bedclothes vs eiderdown

bedclothes

noun
  • Sheets, blankets, quilts or other coverings used on a bed. 

  • Clothing worn to bed. 

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 bedclothes and eiderdown occurred in a corpus of books? (source: Google Ngram Viewer )