Coll vs Rob

Coll

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

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

  • A surname originating as a patronymic. 

Rob

name
  • A diminutive of the male given name Robert. 

  • A surname transferred from the given name, derived from Robert. 

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