preoccupied vs reflective

preoccupied

adj
  • Concerned with something else; distracted; giving one's attention elsewhere. 

  • Describing a scientific name that was previously used, a junior homonym. 

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 preoccupied and reflective occurred in a corpus of books? (source: Google Ngram Viewer )