headscarf vs sari

headscarf

noun
  • A more or less square piece of material worn over the head, typically by women, often to protect the hair, or for religious reasons. 

sari

noun
  • The traditional dress of women in the Indian Subcontinent; an outer garment consisting of a single length of cotton or silk, most often with one end wrapped around the waist to form a skirt, the other draped over the shoulder or head. 

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