Hui vs Panthay

Hui

noun
  • An ethnic group of China, distinguished by their practice of Islam, who speak Mandarin (or Dungan in Kyrgyzstan, Kazakhstan and Russia). 

name
  • A Chinese lect spoken in Southern Anhui and neighbouring Zhejiang and Jiangxi. 

  • A surname from Chinese. 

Panthay

noun
  • An ethnic group of Chinese Muslims in Myanmar. 

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