musing vs reflective

musing

adj
  • Absorbed in thought; contemplative 

noun
  • thought, meditation, contemplation 

reflective

adj
  • Pondering, especially thinking back on the past. 

  • Involving reflection. 

  • Reciprocal. 

  • That reveals or shows; revealing; indicative of. 

  • That reflects, or redirects back to the source. 

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