cf. vs rival

cf.

verb
  • Compare, compare to, compare with. 

  • see, see also 

rival

verb
  • To be equal to, or match, or to surpass another. 

  • To oppose or compete with. 

  • To strive to equal or excel; to emulate. 

adj
  • Having the same pretensions or claims; standing in competition for superiority. 

noun
  • A competitor (person, team, company, etc.) with the same goal as another, or striving to attain the same thing. Defeating a rival may be a primary or necessary goal of a competitor. 

  • Someone or something with similar claims of quality or distinction as another. 

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