asphalt vs dragway

asphalt

noun
  • A sticky, black and highly viscous liquid or semi-solid, composed almost entirely of bitumen, that is present in most crude petroleums and in some natural deposits. 

verb
  • To pave with asphalt. 

dragway

noun
  • A dragstrip, a place where drag races are held. A racetrack to drag on. 

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