bedclothes vs nightwear

bedclothes

noun
  • Clothing worn to bed. 

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

nightwear

noun
  • Clothes worn at nighttime or in bed, such as pyjamas 

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