hajji vs towelhead

hajji

noun
  • A Muslim or Arab. 

  • a Muslim who has participated in a hajj. 

towelhead

noun
  • A member of the Muslims, Arabs, Sikhs, and other groups that traditionally wear headdress such as a turban and keffiyeh or headscarf. 

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