meld vs unify

meld

verb
  • to combine multiple similar objects into one. 

  • In card games, especially of the rummy family, to announce or display a combination of cards. 

noun
  • A combination of cards which is melded. 

unify

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

  • Become one. 

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