esplanade vs trackway

esplanade

noun
  • Any clear, level space used for public walks or drives; especially, a terrace by the seaside. 

  • A clear space between a citadel and the nearest houses of the town. 

  • The glacis of the counterscarp, or the slope of the parapet of the covered way toward the country. 

  • A grass plat; a lawn. 

trackway

noun
  • Any of two or more narrow paths, of steel, smooth stone, or similar, laid in a public roadway otherwise formed of an inferior pavement, such as cobblestones, to provide an easy way for wheeled vehicles. 

  • A set of footprints left in soft ground by a human or animal, especially if fossilized. 

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