Chink vs tink

Chink

noun
  • A person of perceived Chinese ethnicity. 

adj
  • Chinese, or perceived to be Chinese. 

tink

noun
  • A member of the travelling community. A gypsy. 

verb
  • To unknit. 

  • To emit a high-pitched sharp or metallic noise. 

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