rare vs specialized

rare

noun
  • A scarce or uncommon item. 

adj
  • Thin; of low density. 

  • Very uncommon; scarce. 

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

  • Good; enjoyable. 

verb
  • To rear, bring up, raise. 

  • To rear, rise up, start backwards. 

specialized

adj
  • Highly skilled in, or specifically adapted to, a specific field. 

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