letterhead vs papyrus

letterhead

noun
  • Paper marked with a letterhead. 

  • A portion of text at the top of a letter, identifying the sender and often giving their address etc., used for formal correspondence. 

papyrus

noun
  • A material similar to paper made from the papyrus plant. 

  • A plant (Cyperus papyrus) in the sedge family, native to the Nile river valley, paper reed. 

  • A scroll or document written on papyrus. 

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