cross-examination vs third degree

cross-examination

noun
  • The interrogation or questioning of a witness by the party against whom they have been called and examined, in an attempt to prove or reveal something false or untold during direct examination. 

  • Any intense period of questioning, especially if hostile. 

third degree

noun
  • Intensive rough interrogation in order to extract information or a confession 

How often have the words cross-examination and third degree occurred in a corpus of books? (source: Google Ngram Viewer )