catchment area vs harbor

catchment area

noun
  • The area served by a local institution, such as a hospital or school, or by extension, a railway station. 

  • An area from which water drains into a particular lake, river, etc.; the catchment area of a large river includes its tributaries. 

harbor

noun
  • Any place of shelter. 

  • A sheltered expanse of water, adjacent to land, in which ships may anchor or dock, especially for loading and unloading. 

  • A mixing box for materials. 

  • A harbor, even if it is a little harbor, is a good thing, since adventurers come into it as well as go out, and the life in it grows strong, because it takes something from the world, and has something to give in return - Sarah Orne Jewett 

verb
  • To take refuge or shelter in a protected expanse of water. 

  • To drive (a hunted stag) to covert. 

  • To hold or persistently entertain in one's thoughts or mind. 

  • To provide a harbor or safe place for. 

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