devotion vs precation

devotion

noun
  • A prayer (often found in the plural) 

  • The act or state of devoting or being devoted. 

  • Feeling of strong or fervent affection; dedication 

  • Religious veneration, zeal, or piety. 

precation

noun
  • A prayer or act of praying; an earnest request. 

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