pork barrel vs tariff

pork barrel

noun
  • A ready supply of income; one's livelihood. 

  • State funds as assigned for local or regional expenditure; especially, central money used for regional projects which are eyecatching or designed to appeal to voters. 

tariff

noun
  • A system of government-imposed duties levied on imported or exported goods; a list of such duties, or the duties themselves. 

  • A schedule of rates, fees or prices. 

  • A sentence determined according to a scale of standard penalties for certain categories of crime. 

verb
  • to levy a duty on (something) 

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