cf. vs correlate

cf.

verb
  • Compare, compare to, compare with. 

  • see, see also 

correlate

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

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

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

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