café au lait vs espresso

café au lait

noun
  • A mixture of coffee and hot milk. 

  • A light coffee colour. 

  • Coffee and hot milk served in separate jugs as a breakfast drink. 

espresso

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

  • A drink that includes espresso as an ingredient. 

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