curly bracket vs pillow

curly bracket

noun
  • Either of the two characters { and }, i.e., left curly bracket { and right curly bracket }, with the shape of a curved, pointed line, having various uses in math, music, computer programming and chemistry. 

pillow

noun
  • The socket of a pivot. 

  • A soft cushion used to support the head in bed. 

  • A pillow lava. 

  • A block under the inner end of a bowsprit. 

  • A kind of plain, coarse fustian. 

  • A piece of metal or wood, forming a support to equalize pressure; a brass; a pillow block. 

verb
  • To rest as on a pillow. 

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