lesser vs vital

lesser

adj
  • Of two (or, rarely, more than two) things: the smaller in size (littler), in value, in importance etc. 

noun
  • a thing that is of smaller size, value, importance etc. 

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 lesser and vital occurred in a corpus of books? (source: Google Ngram Viewer )