Sonde vs Tongue

Sonde

name

  • A dialect of Kikongo language 

  • A Bantu language 

Tongue

name

  • A village by the Kyle of Tongue in Sutherland, Highland council area, Scotland (OS grid ref NC5956). 

  • A surname. 

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