overdo vs overextend

overdo

verb
  • To do too much; to exceed what is proper or true in doing; to carry too far. 

  • To cook for too long. 

  • To give (someone or something) too much work; to require too much effort or strength of (someone); to use up too much of (something). 

overextend

verb
  • To expand or extend to an excessive degree, especially to do so beyond a safe limit. 

  • To push a pawn too far, so that it becomes vulnerable to the opponent's attacks. 

  • To apply (a term) to too many referents, by overextension. 

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