quittance vs salary

quittance

noun
  • A discharge from a debt or obligation; a document that shows this discharge. 

  • A release or acquittal. 

salary

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

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. 

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