cup of tea vs cupbearer

cup of tea

noun
  • Used other than figuratively or idiomatically: see cup, tea. A cup or mug with tea in it. 

  • three 

  • Whatever suits or interests one. 

cupbearer

noun
  • One who ceremonially fills and hands out the cups in which a drink is served. 

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