swamp vs swampland

swamp

noun
  • A piece of wet, spongy land; low ground saturated with water; soft, wet ground which may have a growth of certain kinds of trees, but is unfit for agricultural or pastoral purposes. 

  • A place or situation that is foul or where progress is difficult. 

  • A type of wetland that stretches for vast distances, and is home to many creatures which have adapted specifically to that environment. 

verb
  • To overwhelm; to make too busy, or overrun the capacity of. 

  • To plunge into difficulties and perils; to overwhelm; to ruin; to wreck. 

  • To drench or fill with water. 

swampland

noun
  • Low-lying land that is regularly flooded; especially such land that is drier than a bog or a marsh. 

  • The set of effective low-energy physical theories that are not compatible with quantum gravity. 

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