shemagh vs turban

shemagh

noun
  • A headcloth designed for a desert environment to protect the wearer from sand and heat. 

turban

noun
  • A man's headdress made by winding a length of cloth round the head. 

  • A woman's close-fitting hat with little or no brim. 

  • The complete set of whorls of a spiral shell. 

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