overburden vs overreach

overburden

verb
  • To overload or overtax. 

noun
  • A sterile stratum that lies above the stratum being investigated 

  • The rock and subsoil that lies above a mineral deposit such as a coal seam. 

overreach

verb
  • To reach above or beyond, especially to an excessive degree. 

  • To defeat or override a person's interest in property; (Britain, specifically) of a holder of the legal title of real property: by mortgaging or selling the legal title to a third party, to cause another person's equitable right in the property to be dissolved and to be replaced by an equitable right in the money received from the third party. 

  • To sail on one tack farther than is necessary. 

  • To do something beyond an appropriate limit, or beyond one's ability. 

  • Of a horse: to strike the heel of a forefoot with the toe of a hindfoot. 

noun
  • An act of extending or reaching over, especially if too far or too much; overextension. 

  • Of a horse: an act of striking the heel of a forefoot with the toe of a hindfoot; an injury caused by this action. 

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