Mussulman vs Saracen

Mussulman

Saracen

noun
  • A type of six-wheeled armoured personnel carrier. 

  • A member of a nomadic people from the Sinai near the Roman province of Arabia in the early centuries CE, who were specifically distinct from Arabs. 

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