commiseration vs rogation

commiseration

noun
  • The act of commiserating; sorrow for the hardships or afflictions of another; pity; compassion. 

rogation

noun
  • A deeply serious and somber prayer or entreaty. 

  • The demand, by the consuls or tribunes, of a law to be passed by the people; a proposed law or decree. 

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