Back vs Comber

Back

name

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

  • A surname. 

Comber

name

  • A town in County Down, Northern Ireland (Irish grid ref J4669). 

  • A surname. 

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