bedclothes vs pillowcase

bedclothes

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

  • Clothing worn to bed. 

pillowcase

noun
  • A washable, easily removable cloth cover for pillows. 

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