cataract vs inundation

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. 

inundation

noun
  • The state of being inundated; flooding 

  • The act of inundating; an overflow; a flood; a rising and spreading of water over grounds. 

  • An overflowing or superfluous abundance; a flood; a great influx 

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