Ottoman vs tribunal

Ottoman

noun
  • A citizen of the Ottoman Empire. 

adj
  • Of the Ottoman Empire. 

  • Turkish 

tribunal

noun
  • A kind of village hall used to transact business, to quarter troops and travellers, and to confine prisoners. 

  • An assembly including one or more judges to conduct judicial business; a court of law. 

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