contemplation vs meditation

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. 

meditation

noun
  • A contemplative discourse, often on a religious or philosophical subject. 

  • A devotional exercise of, or leading to contemplation. 

  • Careful and thorough thought. 

  • A musical theme treated in a meditative manner. 

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