Ishmaelite vs Mohammedan

Ishmaelite

noun

  • An Arab Muslim. 

  • An outcast. 

  • Any descendant of Ishmael. 

Mohammedan

noun

  • Muslim. 

adj

  • Muslim, Islamic. 

  • relating to Mohammed. 

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