unification vs unifying

unification

noun
  • The state of being unified. 

  • Given two terms, their join with respect to a specialisation order. 

  • The act of unifying. 

unifying

noun
  • unification 

adj
  • Tending to unify; promoting unity; uniting. 

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