contemplation vs thoughtfulness

contemplation

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

  • The act of looking forward to a future event 

  • Holy meditation. 

  • The state of being considered or planned. 

thoughtfulness

noun
  • Thoughtful and considerate attention. 

  • Careful deliberation before action. 

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