expenditure vs salary

expenditure

noun
  • The amount expended; expense; outlay. 

  • Act of expending or paying out. 

salary

noun
  • A fixed amount of money paid to a worker, usually calculated on a monthly or annual basis, not hourly, as wages. Implies a degree of professionalism and/or autonomy. 

verb
  • To pay on the basis of a period of a week or longer, especially to convert from another form of compensation. 

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