government vs iron fist

government

noun
  • The management or control of a system. 

  • The body with the power to make and/or enforce laws to control a country, land area, people or organization. 

  • The relationship between a word and its dependents. 

  • The state and its administration viewed as the ruling political power. 

  • The tenure of a chief of state. 

iron fist

noun
  • Ruthless and usually unrestricted control. 

  • Symbol of an army's tank or cavalry branch. 

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