exclude vs unify

exclude

verb
  • To expel; to put out. 

  • To omit from consideration. 

  • To bar (someone or something) from entering; to keep out. 

  • To refuse to accept (evidence) as valid. 

  • To eliminate from diagnostic consideration. 

unify

verb
  • Cause to become one; make into a unit; consolidate; merge; combine. 

  • Become one. 

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