initiative vs vitality

initiative

noun
  • The ability to act first or on one's own. 

  • An issue to be voted on, brought to the ballot by a sufficient number of signatures from among the voting public. 

  • A new development; a fresh approach to something; a new way of dealing with a problem. 

  • A beginning; a first move. 

adj
  • Serving to initiate; inceptive; initiatory; introductory; preliminary. 

  • In which voter initiatives can be brought to the ballot. 

vitality

noun
  • That which distinguishes living from nonliving things; life, animateness. 

  • Energy or vigour. 

  • The capacity to live and develop. 

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