charva vs ned

charva

noun
  • Unruly youth; disobedient child or teenager. 

  • Friend; mate. 

  • A chav. 

ned

noun
  • A person, usually a youth, of low social standing and education, a violent disposition and with a particular style of dress (typically sportswear or Burberry), speech and behaviour. 

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