overburden vs surcharge

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. 

surcharge

verb
  • To overload; to overburden. 

  • To overstock; especially, to put more cattle into (e.g. a common) than one has a right to do, or more than the herbage will sustain. 

  • To apply a surcharge. 

  • To show an omission in (an account) for which credit ought to have been given. 

noun
  • An overprint on a stamp that alters (usually raises) the original nominal value of the stamp; used especially in times of hyperinflation. 

  • An excessive price charged e.g. to an unsuspecting customer. 

  • A charge that has been omitted from an account as payment of a credit to the charged party 

  • A penalty for failure to exercise common prudence and skill in the performance of a fiduciary's duties. 

  • A painting in lighter enamel over a darker one that serves as the ground. 

  • An addition of extra charge on the agreed or stated price. 

  • The part of the price of a subsidized good or service that is not covered by the subsidy and so must be paid by the consumer. 

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