boot boy vs mischief

boot boy

noun
  • One of a gang of violent hooligans who usually wear short-cropped hair and bovver boots. 

  • A boy who cleans boots and shoes. 

  • A boy who cares for a footballer's boots. 

mischief

noun
  • A playfully annoying action. 

  • Casual and/or flirtatious sexual acts. 

  • A group or a pack of rats. 

  • A criminal offence defined in various ways in various jurisdictions, sometimes including causing damage to another's property. 

  • Conduct that playfully causes petty annoyance. 

  • The Devil; used as an expletive. 

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