grandstand vs toot one's own horn

grandstand

verb
  • To behave dramatically or showily to impress an audience or observers; to pander to a crowd. 

noun
  • The audience at a public event. 

  • The seating area at a stadium or arena; the bleachers. 

toot one's own horn

verb
  • To promote oneself; to boast or brag; to tout oneself. 

How often have the words grandstand and toot one's own horn occurred in a corpus of books? (source: Google Ngram Viewer )