dey vs milking machine

dey

noun
  • A servant who has charge of the dairy; a dairymaid. 

  • The ruler of the Regency of Algiers (now Algeria) under the Ottoman Empire. 

milking machine

noun
  • A machine for milking cows. 

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