cover up vs show off

cover up

verb
  • To conceal or disguise. 

  • To clothe. 

  • To put covers over oneself in bed. 

show off

verb
  • To exhibit the best attributes of something. 

  • 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. 

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