Back vs Coll

Back

name
  • A settlement on the Isle of Lewis, Western Isles council area, Scotland (OS grid ref NB4840). 

  • A surname. 

Coll

name
  • An island of the Inner Hebrides in Argyll and Bute council area, Scotland. 

  • A surname originating as a patronymic. 

  • A medieval English short form of the male given name Nicholas; very rare today. 

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