alopecia vs moult

alopecia

noun
  • Loss of hair (especially on the head) or loss of wool or feathers, whether natural or caused by disease. 

  • Baldness. 

  • Deficiency of the hair, which may be caused by failure to grow or loss after growth. 

moult

noun
  • The process of shedding or losing a covering of fur, feathers or skin etc. 

  • The skin or feathers cast off during the process of moulting. 

verb
  • To shed or lose a covering of hair or fur, feathers, skin, horns, etc, and replace it with a fresh one. 

  • To shed in such a manner. 

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