anachronistic vs past its prime

anachronistic

adj
  • Erroneous in date; containing an anachronism; in a wrong time; not applicable to or not appropriate for the time. 

  • Having opinions from the past; preferring things or values of the past; behind the times; overly conservative. 

past its prime

How often have the words anachronistic and past its prime occurred in a corpus of books? (source: Google Ngram Viewer )