cha vs herbal tea

cha

noun
  • tea, sometimes (dialect) specifically masala chai 

  • Synonym of Korean foot: a traditional unit of length equivalent to about 30.3 cm. 

pron
  • You. 

particle
  • Used to count out steps, particularly involving the hip-shaking sections of rhythmic Latin dances 

herbal tea

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

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