contemplation vs du'a'

contemplation

noun
  • Holy meditation. 

  • The act of looking forward to a future event 

  • The state of being considered or planned. 

  • The act of contemplating; musing; being highly concentrated in thought 

du'a'

noun
  • private prayer by an individual 

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