holm vs swamp

holm

noun
  • Rich flat land near a river, prone to being completely flooded; a river-meadow; bottomland. 

  • Any small island, but especially one near a larger island or the mainland, sometimes with holly bushes; an islet. Often the word is used in Norse-influenced place-names. See also holme. 

  • A common evergreen oak of Europe, Quercus ilex; the holm oak. 

  • Small island, islet. 

  • An island in a lake, river or estuary; an eyot. 

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. 

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