herbal tea vs refreshment

herbal tea

noun
  • A beverage made by infusing the leaves of various herbs, generally not including true tea (Camellia sinensis). 

refreshment

noun
  • A light snack or drink. 

  • The action of refreshing; a means of restoring strength, energy or vigour. 

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