alike vs identically

alike

adv
  • In the same manner, form, or degree; in common; equally. 

adj
  • Having resemblance or similitude; similar; without difference. 

identically

adv
  • In an identical manner. 

  • In terms of an identity. 

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