boot boy vs slaphead

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. 

slaphead

noun
  • A bald person; somebody with a shaved or hairless head. 

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