high road vs parkway

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. 

parkway

noun
  • A divided highway with a landscaped median. 

  • A scenic freeway. 

  • A tree lawn. 

  • a railway station built on the edge of a town, typically with a large car park to function as a park and ride interchange. 

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