coif vs hair style

coif

verb
  • To style or arrange hair. 

noun
  • A similar item of chain mail headgear covering the head. 

  • A hood; a close-fitting cap covering much of the head, widespread until the 18th century; after that worn only by small children and country women. 

  • A hairdo. 

  • An official headdress, such as that worn by certain judges in England. 

hair style

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