afternoon tea vs high tea

afternoon tea

noun
  • A formal afternoon meal comprising light snacks, accompanied by tea. 

  • A small meal or snack eaten between lunch and dinner (supper); a period of time set aside for this purpose, taken as a break from work or from a conference. 

high tea

noun
  • A late afternoon or early evening meal, typically consisting of a cooked dish with bread and butter and tea. 

  • Formal afternoon tea. 

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