best of British vs more power to your elbow

best of British

noun

  • Good luck 

more power to your elbow

intj

  • Used to express admiration of a person coupled with wishes for their continued success in an endeavour of their own choosing: all the best; good luck. 

How often have the words best of British and more power to your elbow occurred in a corpus of books? (source: Google Ngram Viewer )