show off vs talk big

show off

verb
  • To attract attention to for the purpose of bragging or personal exhibitionism; to demonstrate a skill, talent or property for the purpose of bragging or personal exhibitionism. 

  • To exhibit the best attributes of something. 

talk big

verb
  • To brag; to exaggerate one's abilities or achievements. 

How often have the words show off and talk big occurred in a corpus of books? (source: Google Ngram Viewer )