first class vs skill

first class

adj
  • Great, very enjoyable. 

  • Of, or relating to the most luxurious and expensive class of accommodation on a train, ship, hotel, etc. 

  • Of, or relating to a first class match. 

  • Belonging to the best or top group in a system of classification. 

  • Of, or relating to a class of mail to be delivered before second class. 

  • Of, or relating to a treatment like that for a first-class citizen. 

noun
  • the third year of primary school, following after the junior and senior infant levels. 

  • premier rank. 

  • One of two classes of city government in the U.S. state of Kentucky, in which cities elect a mayor and aldermen. 

skill

adj
  • Great, excellent. 

verb
  • To know; to understand. 

  • To have knowledge or comprehension; discern. 

  • To set apart; separate. 

  • To discern; have knowledge or understanding; to know how (to). 

  • To have personal or practical knowledge; be versed or practised; be expert or dextrous. 

  • To spend acquired points in exchange for skills. 

noun
  • Capacity to do something well; technique, ability. Skills are usually acquired or learned, as opposed to abilities, which are often thought of as innate. 

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