encompass vs involve

encompass

verb
  • To include within its scope; to circumscribe or go round so as to surround; to enclose; to contain. 

  • To go around, especially, to circumnavigate. 

  • To include completely; to describe fully or comprehensively. 

  • To form a circle around; to encircle. 

involve

verb
  • To comprise or include; to have as a related part. 

  • To take in; to gather in; to mingle, blend or merge. 

  • To cause or engage (someone or something) to participate or to become connected or implicated. 

  • To complicate or make intricate. 

  • To envelop, enfold, entangle. 

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