learned vs time-served

learned

adj
  • Derived from experience; acquired by learning. 

  • Having much learning, knowledgeable, erudite; highly educated. 

  • Scholarly, exhibiting scholarship. 

  • A courteous description used in various ways to refer to lawyers or judges. 

time-served

adj
  • Having completed an apprenticeship or period of training, thus acquiring skills. 

  • Having completed many years of service. 

How often have the words learned and time-served occurred in a corpus of books? (source: Google Ngram Viewer )