Rade vs Wend

Rade

noun
  • A minor ethnic group in the Central Highlands of Vietnam. 

name
  • The Austronesian language of the Chamic branch spoken by the Rade people. 

Wend

noun
  • A Slavic person living anywhere in the vicinity of German-speaking areas. 

  • A member of a Slavic people from the borders of Germany and Poland; a Sorb; a Kashub. 

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