deception vs sharp practice

deception

noun
  • An instance of actions and/or schemes fabricated to mislead someone into believing a lie or inaccuracy. 

sharp practice

noun
  • Commercial activity that is possibly dishonest while not actually being illegal. 

  • A lawyer's unfairly taking advantage of an opposing party's missteps or inexperience to gain an advantage. 

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