inundation vs tsunami

inundation

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

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

  • The state of being inundated; flooding 

tsunami

noun
  • A large and generally unstoppable surge. 

  • A very large and destructive wave, generally caused by a tremendous disturbance in the ocean, such as an undersea earthquake or volcanic eruption. Tsunami are usually a series of waves, or wave train. 

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