seasoned vs time-served

seasoned

adj
  • Experienced, especially in terms of a profession or a hobby 

  • Of a food, often a liquid: containing seasonings 

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 seasoned and time-served occurred in a corpus of books? (source: Google Ngram Viewer )