fallow vs flatland

fallow

noun
  • Uncultivated land. 

  • The ploughing or tilling of land, without sowing it for a season. 

  • Ground ploughed and harrowed but left unseeded for one year. 

verb
  • To make land fallow for agricultural purposes. 

adj
  • Ploughed but left unseeded for more than one planting season. 

  • Left unworked and uncropped for some amount of time. 

  • Of a pale red or yellow, light brown; dun. 

  • Inactive; undeveloped. 

flatland

noun
  • Synonym of plain: land of relatively constant altitude, usually exclusive of forests, deserts, and wastelands. 

  • An urban region with many flats or apartments to rent. 

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