Back vs Sea

Back

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

  • A surname. 

Sea

name
  • A hamlet in Ilminster parish, South Somerset district, Somerset, England (OS grid ref ST3413). 

  • A surname. 

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