Nigel vs overner

Nigel

noun
  • An Englishman. 

  • Synonym of dweeb (“boring or socially inept person”) 

name
  • A male given name from Latin, of mostly British usage. 

overner

noun
  • A person from the mainland (Great Britain) 

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