slush fund vs venality

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. 

venality

noun
  • The fact or state of being for sale, especially with reference to bribes or corruption. 

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