correlate vs show the similarity between

correlate

noun
  • Either of a pair of things related by a correlation; a correlative. 

verb
  • To compare things and bring them into a relation having corresponding characteristics. 

  • To be related by a correlation; to be correlated. 

show the similarity between

How often have the words correlate and show the similarity between occurred in a corpus of books? (source: Google Ngram Viewer )