greave vs jamber

greave

noun
  • A piece of armour that protects the leg, especially the shin, and occasionally the tops of the feet. 

verb
  • To clean (a ship's bottom); to grave. 

jamber

noun
  • Synonym of jambeau (“piece of armor for the leg”). 

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