esplanade vs parkland

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. 

parkland

noun
  • Land suitable for use as a park. 

  • A landscape characterized by a mixture of treed groves and open grasslands, akin to a Eurasian forest steppe. 

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