bluster vs bravado

bluster

noun
  • Fitful noise and violence. 

  • A gust of wind. 

  • Pompous, officious talk. 

verb
  • To act or speak in an unduly threatening manner. 

  • To blow in strong or sudden gusts. 

  • To speak or protest loudly. 

bravado

noun
  • A swaggering show of defiance or courage. 

  • A false show of courage. 

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