meditation vs self-absorption

meditation

noun
  • A devotional exercise of, or leading to contemplation. 

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

  • Careful and thorough thought. 

  • A musical theme treated in a meditative manner. 

self-absorption

noun
  • Preoccupation with oneself to the exclusion of everything else. 

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