Naga vs dragon lady

Naga

noun
  • A member of a conglomeration of various tribes, living in Nagaland (India) and surrounding areas, and speaking various Tibeto-Burman languages. 

dragon lady

noun
  • An East Asian woman who is stereotypically strong, deceitful, domineering, or mysterious. 

How often have the words Naga and dragon lady occurred in a corpus of books? (source: Google Ngram Viewer )