deduct vs mark up

deduct

verb
  • To take one thing from another; remove from; make smaller or less by some amount. 

mark up

verb
  • To increase the price of something between its wholesale and retail phase. 

  • To add coding to text so that it will display properly on a computer. 

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