meditation vs ratiocination

meditation

noun
  • Careful and thorough thought. 

  • A devotional exercise of, or leading to contemplation. 

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

  • A musical theme treated in a meditative manner. 

ratiocination

noun
  • Reasoning, conscious deliberate inference; the activity or process of reasoning. 

  • Thought or reasoning that is exact, valid and rational. 

  • A proposition arrived at by such thought. 

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