boa vs keffiyeh

boa

noun
  • A type of long scarf; typically made from synthetic or real feathers (or occasionally fur), and usually worn by being draped across the shoulders with the ends hanging low, sometimes also with a loop around the neck. 

  • Any of a group of large American snakes, of the genus Boa, subfamily Boinae, or family Boidae, including the boa constrictor and the emperor boa of Mexico. 

keffiyeh

noun
  • A headdress traditionally worn by some Arabs, also used as a scarf. 

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