coercive vs iron-fisted

coercive

adj
  • Displaying a tendency or intent to coerce. 

  • Such that the ratio of |F(x)| to x approaches infinity as x approaches infinity. 

iron-fisted

adj
  • Characterized by ruthless control 

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