balls of steel vs swagger

balls of steel

noun
  • Courage, audacity. 

swagger

noun
  • Confidence, pride. 

  • A bold or arrogant strut. 

  • A prideful boasting or bragging. 

  • Synonym of swagman 

verb
  • To boast or brag noisily; to bluster; to bully. 

  • To behave (especially to walk or carry oneself) in a pompous, superior manner. 

  • To walk with a swaying motion. 

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