Bristle vs Harrow

Bristle

name
  • Bristol, England (in imitation of the local dialect) 

Harrow

name
  • A town in northwestern Greater London, England. 

  • A London borough of Greater London, England. 

  • A prestigious public school for boys in the town of Harrow. 

  • A surname originating as an occupation for a harrower. 

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