arraign vs slag off

arraign

verb
  • To call to account, or accuse, before the bar of reason, taste, or any other tribunal. 

  • To officially charge someone in a court of law. 

noun
  • Arraignment. 

slag off

verb
  • To talk insultingly to or about someone or something; usually one who is not present. 

  • To purify by melting and removing slag. 

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