espresso vs latte

espresso

noun
  • A drink that includes espresso as an ingredient. 

  • A concentrated coffee beverage brewed by forcing hot water under high pressure through finely ground coffee. 

latte

noun
  • A similar drink, where the espresso is replaced with some other flavoring ingredient such as chai, maté or matcha (green tea). 

  • A drink of coffee made from espresso and steamed milk, generally topped with foam. 

  • A pillar capped by a hemispherical stone capital with the flat side facing up, used as building supports by the ancient Chamorro people and now used as a sign of Chamorro identity. 

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