blacktop vs roadway

blacktop

noun
  • A road so paved. 

  • Asphalt concrete or similar bituminous black paving material used for the surface of roads (e.g., tarmacadam, tarmac). 

  • A paved area on a schoolground reserved for recess activities, often doubling as a parking lot. 

verb
  • To pave with blacktop. 

roadway

noun
  • A way used as a road. 

  • The main or central portion of a road, used by the vehicles. 

  • The portion of a bridge or railway used by traffic. 

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