con vs slush fund

con

noun
  • A fraud; something carried out with the intention of deceiving, usually for personal, often illegal, gain. 

  • The conversion of part of a building. 

  • An organized gathering, such as a convention, conference, or congress. 

  • A convicted criminal, a convict. 

  • A disadvantage of something, especially when contrasted with its advantages (pros). 

  • A political conservative. 

verb
  • To trick or defraud, usually for personal gain. 

  • To study or examine carefully, especially in order to gain knowledge of; to learn, or learn by heart. 

slush fund

noun
  • Money stored for illegal or dishonest purposes. 

  • Money that has not been hypothecated or dedicated to a particular purpose, or which is used for a different purpose than originally intended. 

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