overswell vs tidal wave

overswell

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

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

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

tidal wave

noun
  • A large, sudden inundation of water from the storm surge, or waves of that surge; a sudden surge of river water. 

  • A large, sudden, and disastrous wave of water caused by a tremendous disturbance in the ocean; a tsunami. (See Usage notes below.) 

  • A crest of ocean water resulting from tidal forces. 

  • A sudden and powerful surge. 

  • A large and sudden rise and fall in the tide. 

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