cairn vs tur

cairn

noun
  • A cairn terrier. 

  • A pile of stones heaped up as a landmark, to guide travelers on land or at sea, or to arrest attention, as in surveying, or in leaving traces of an exploring party, etc. 

  • A rounded or conical heap of stones erected by early inhabitants of the British Isles, apparently as a sepulchral monument. 

tur

noun
  • Either of two species of wild goat native to Caucasus, West Caucasian tur Capra caucasica or East Caucasian tur Capra cylindricornis. 

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