fettler vs pardner

fettler

noun
  • A friend or mate 

  • A person who maintains railway lines. 

  • Someone who fiddles or tinkers with things. 

  • An ostler; one who looks after the horses in a mine. 

  • Someone whose job is to sand and grind small imperfections from metal and ceramic castings. 

pardner

noun
  • A friend or companion. 

  • A local community banking co-op, often set up as an initiative for a social group unable to get formal credit or bank accounts, notably West Indians in Britain. 

  • A partner. 

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