firman vs pronunciamento

firman

noun
  • A royal decree issued by a sovereign in certain historical Islamic states, especially by the Sultan of Turkey. 

pronunciamento

noun
  • A manifesto or formal public declaration, originally political; a proclamation. 

  • In Mexico and Latin America, an uprising or insurrection. 

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