bracer vs strengthener

bracer

noun
  • That which braces, binds, or makes firm; a band or bandage. 

  • A medicine, as an astringent or a tonic, which gives tension or tone to any part of the body. 

  • A covering to protect the arm of the bowman from the vibration of the string. 

  • Armor for the forearm; a brassard. 

  • Something bracing; a stimulant. 

strengthener

noun
  • One who, or that which, gives or adds strength. 

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