discredit vs get behind

discredit

noun
  • A degree of dishonour or disesteem; ill repute; reproach. 

  • A person or thing that causes harm to a reputation, as of a person, family, or institution. 

  • The state of being discredited or disbelieved. 

  • Discrediting or disbelieving. 

verb
  • To harm the good reputation of a person; to cause an idea or piece of evidence to seem false or unreliable. 

get behind

verb
  • To support, to cheer on. 

  • To have a trip or any pleasurable experience with drugs. 

  • To come to believe something; to change one's mind into a new position. 

  • To appreciate, to enjoy. 

  • Used other than figuratively or idiomatically: see get, behind. 

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