rare vs skill

rare

adj
  • Good; enjoyable. 

  • Thin; of low density. 

  • Very uncommon; scarce. 

  • Particularly of meat, especially beefsteak: cooked very lightly, so the meat is still red. 

verb
  • To rear, bring up, raise. 

  • To rear, rise up, start backwards. 

noun
  • A scarce or uncommon item. 

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 rare and skill occurred in a corpus of books? (source: Google Ngram Viewer )