cataract vs waterspout

cataract

noun
  • A flood of water. 

  • A clouding of the lens in the eye leading to a decrease in vision. 

  • A large waterfall; steep rapids in a river. 

  • An overwhelming downpour or rush. 

waterspout

noun
  • A plume of water rising from the surface of a body of water as the result of an impact or explosion. 

  • A whirlwind that forms over water, not associated with a mesocyclone of a thunderstorm (contrary to a true tornado). 

  • A true tornado that passes over a body of water. 

  • A channel through which water is discharged, especially from the gutters of a roof. 

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