Coll vs Roger

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. 

Roger

name
  • A male given name from the Germanic languages. 

  • A surname originating as a patronymic. 

  • Jolly Roger (pirate flag) 

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