afternoon tea vs dinnertime

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. 

dinnertime

noun
  • The time when dinner takes place. 

  • The midday break in English schools (some areas), lunchtime. 

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