bottom line vs gross profit

bottom line

noun
  • The final balance; the amount of money or profit left after everything has been tallied. 

  • The summary or result; the most important information. 

  • A minimum acceptable result from a negotiation. 

gross profit

noun
  • the difference between net sales and the cost of goods sold 

How often have the words bottom line and gross profit occurred in a corpus of books? (source: Google Ngram Viewer )