Grain vs Ore

Grain

name
  • A village on the Isle of Grain, Medway borough, Kent, England (OS grid ref TQ8876). 

  • A surname. 

Ore

name
  • A suburban area, formerly a village, in Hastings borough, East Sussex, England (OS grid ref TQ8311). 

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