difficulty vs profit

difficulty

noun
  • Physical danger from the environment, especially with risk of drowning 

  • An obstacle that hinders achievement of a goal. 

  • The state of being difficult, or hard to do. 

  • An objection. 

  • An awkward situation or quarrel. 

  • That which cannot be easily understood or believed. 

profit

verb
  • To benefit (somebody), be of use to (somebody). 

  • To take advantage of, exploit, use. 

  • To benefit, gain. 

noun
  • Total income or cash flow minus expenditures. The money or other benefit a non-governmental organization or individual receives in exchange for products and services sold at an advertised price. 

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