flight feather vs plumage

flight feather

noun
  • Any asymmetrical feather of the wing or tail of a bird. 

plumage

noun
  • Layer or collection of feathers covering a bird’s body; feathers used ornamentally; feathering. 

  • Finery or elaborate dress. 

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