billfold vs packet

billfold

noun
  • A small, folding sleeve or case designed to hold paper currency, as well as credit cards, pictures, etc. 

packet

noun
  • A plastic bag. 

  • Synonym of package (“male genitalia”) 

  • A small pack or package; a little bundle or parcel 

  • Originally, a vessel employed by government to convey dispatches or mails; hence, a vessel employed in conveying dispatches, mails, passengers, and goods, and having fixed days of sailing; a mail boat. Packet boat, ship, vessel (Wikipedia). 

  • A specimen envelope containing small, dried plants or containing parts of plants when attached to a larger sheet. 

  • A large amount of money. 

  • A small fragment of data as transmitted on some types of network, notably Ethernet networks (Wikipedia). 

verb
  • To send in a packet or dispatch vessel. 

  • To make up into a packet or bundle. 

  • To ply with a packet or dispatch boat. 

  • To subject to a denial-of-service attack in which a large number of data packets are sent. 

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