reform vs renew

reform

verb
  • To put into a new and improved form or condition; to restore to a former good state, or bring from bad to good; to change from worse to better 

  • To form again or in a new configuration. 

  • to reform a profligate man; to reform corrupt manners or morals; to reform a criminal 

  • To return to a good state; to amend or correct one's own character or habits 

noun
  • The change of something that is defective, broken, inefficient or otherwise negative, in order to correct or improve it 

renew

verb
  • To make (something) new again; to restore to freshness or original condition. 

  • To replace (something which has broken etc.); to replenish (something which has been exhausted), to keep up a required supply of. 

  • To repeat. 

  • To begin again; to recommence. 

  • To make new spiritually; to regenerate. 

  • To extend a period of loan, especially a library book that is due to be returned. 

noun
  • Synonym of renewal 

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