black tea vs teatime

black tea

noun
  • A cup of tea served without milk. 

  • Tea leaves which have been "fermented" (actually, oxidized) before drying to enhance their flavour (cf. green tea). 

teatime

noun
  • The traditional time, in the late afternoon, for serving tea (the meal). 

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