overswell vs swamp

overswell

verb
  • To swell or rise above (something, especially the rim of a container, the sides of something hollow, etc.). 

  • To cause (something) to be too swollen or large; to become too swollen or large. 

noun
  • An excessive or sudden increase or flood (of something). 

swamp

verb
  • To drench or fill with water. 

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

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

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. 

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