overboard vs overkill

overboard

adj
  • Outside of a boat; in the water. 

verb
  • To throw over the edge of a boat into the water. 

adv
  • Over the edge; especially, off or outside of a boat. 

  • Excessively; too much. 

overkill

noun
  • An unnecessary excess of disposal because of too high criteria of inspection. 

  • Destruction beyond what is necessary to kill, especially in murder. 

  • A destructive capacity that exceeds that needed to destroy an enemy; especially with nuclear weapons. 

  • An unnecessary excess of whatever is needed to achieve a goal. 

verb
  • To do something excessive to achieve a goal. 

  • To destroy something with more (nuclear) force than is required. 

  • To dispose of too many items because of too-high criteria of inspection. 

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