curly bracket vs pucker

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. 

pucker

noun
  • A fold or wrinkle. 

  • A state of perplexity or anxiety; confusion; bother; agitation. 

verb
  • To pinch or wrinkle; to squeeze inwardly, to dimple or fold. 

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