egret vs horsehair

egret

noun
  • A plume or tuft of feathers worn as a part of a headdress, or anything imitating such an ornament. 

  • Any of various wading birds of the genera Egretta or Ardea that includes herons, many of which are white or buff, and several of which develop fine plumes during the breeding season. 

  • The flying feathery or hairy crown of seeds or achenes, such as the down of the thistle. 

horsehair

noun
  • The hair of a horse, especially from the mane and tail, used for upholstery. 

  • A fabric made from this. 

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