fight off vs repress

fight off

verb
  • To succeed in defeating a challenge, or an attack. 

  • To resist, particularly an infection or an emotion. 

repress

verb
  • To forcefully prevent an upheaval from developing further. 

  • To check; to keep back. 

  • To press again. 

noun
  • A record pressed again; a repressing. 

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