B road vs high road

B road

noun
  • Any of many minor roads in Britain, typically branching off of A roads and travelling to smaller towns and villages 

high road

noun
  • A main road or highway. 

  • Used other than figuratively or idiomatically: see high, road. 

  • A course of action which is dignified, honourable, or respectable. 

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