meditation vs pensiveness

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. 

pensiveness

noun
  • A thoughtful or reflective state, especially if sad or melancholic. 

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