markup vs overestimate

markup

noun
  • An increase in price. 

  • The process by which proposed legislation is debated and amended. 

  • The notation that is used to indicate the meaning of the elements in an electronic document, or to dictate how text should be displayed. 

  • The percentage or amount by which a seller hikes up his buy-in price when determining his selling price. 

overestimate

noun
  • An estimate that is too high. 

verb
  • To judge or calculate too highly. 

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