Tai vs Thai

Tai

noun
  • A descendant of speakers of a common proto-Tai language, including subpopulations which no longer speak a Tai language. 

name
  • A surname. 

  • A female given name from Chinese. 

  • A branch of the Tai-Kadai language family, including Thai, Lao, Shan, and Zhuang. 

Thai

noun
  • A person living in or coming from Thailand. 

  • A domestic cat breed. 

  • Thai cuisine; traditional Thai food. 

  • The main language spoken in Thailand (closely related to Lao). 

adj
  • Of or pertaining to Thailand. 

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