Webley vs derringer

Webley

name
  • An English habitational surname for someone who lived in Weobley in Herefordshire. 

derringer

noun
  • A type of very small, concealable pistol with one or two barrels, but without any loading system or magazine. 

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