chance vs vital

chance

noun
  • probability; possibility. 

  • The probability of something happening. 

  • An opportunity or possibility. 

  • Random occurrence; luck. 

adj
  • Happening by chance, casual. 

verb
  • To try or risk. 

  • To discover something by chance. 

  • To rob, cheat or swindle someone. 

vital

adj
  • Invigorating or life-giving. 

  • Very important. 

  • Containing life; living. 

  • Necessary to continued existence. 

  • Necessary to the continuation of life; being the seat of life; being that on which life depends. 

  • Capable of living; in a state to live; viable. 

  • Relating to the recording of life events. 

  • Relating to, or characteristic of life. 

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