coercive vs oppressive

coercive

adj
  • Displaying a tendency or intent to coerce. 

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

oppressive

adj
  • Tyrannical or exercising unjust power. 

  • Hot and humid of the weather. 

  • Burdensome or difficult to bear. 

  • Weighing heavily on the spirit; intense, or overwhelming 

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