safely vs seriously

safely

adv
  • In a safe manner; without risk; using caution above all else. 

  • In a secure manner; without the possibility of injury or harm resulting. 

seriously

adv
  • In an extreme or major way; majorly 

  • Used to attempt to introduce a serious point in a less serious conversation. 

  • In a serious or literal manner. 

  • Used to call back to a previous point, in disbelief or for emphasis. 

  • Gravely; deeply; very much. 

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