armband vs wristlet

armband

noun
  • A band worn around the arm, usually to symbolize protest or mourning. 

  • An inflatable band worn round the arms to keep afloat in water 

  • A band worn around the arm of the captain of a team. 

wristlet

noun
  • A decorative band or bracelet that encircles the wearer's wrist; especially, a closely knitted one to keep it warm; a muffetee. 

  • An elastic band worn to keep a glove from slipping off the wrist. 

  • A small handbag with a short strap for attaching it to the wearer's wrist. 

  • A handcuff. 

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