curly bracket vs sinew

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. 

sinew

noun
  • A cord or string, particularly (music) as of a musical instrument. 

  • That which gives strength or in which strength consists; a supporting factor or member; mainstay. 

  • A cord or tendon of the body. 

  • Muscular power, muscle; nerve, nervous energy; vigor, vigorous strength. 

verb
  • To knit together or make strong with, or as if with, sinews. 

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