felon vs offender

felon

noun
  • A person who has committed a felony. 

  • A wicked person. 

  • A bacterial infection at the end of a finger or toe. 

  • A person who has been tried and convicted of a felony. 

adj
  • wicked; cruel 

offender

noun
  • A person who commits an offense against the law, a lawbreaker. 

  • One who gives or causes offense, or does something wrong. 

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