Vandal vs treacherous

Vandal

adj
  • Of or relating to the Vandals. 

noun
  • A member of an ancient east Germanic tribe famous for sacking Rome. 

name
  • An extinct East Germanic language ascribed to have been spoken by the Vandals. 

treacherous

adj
  • Deceitful; inclined to betray. 

  • Unreliable; dangerous. 

  • Exhibiting treachery. 

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