overswell vs seesaw

overswell

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.). 

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

seesaw

verb
  • To fluctuate. 

  • To cause to move backward and forward in seesaw fashion. 

  • To use a seesaw. 

adj
  • fluctuating. 

noun
  • An abnormal breathing pattern caused by airway obstruction, characterized by paradoxical chest and abdominal movement. 

  • A structure composed of a plank, balanced in the middle, used as a game in which one person goes up as the other goes down. 

  • A series of up-and-down movements. 

  • A series of alternating movements or feelings. 

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