neckerchief vs red scarf

neckerchief

noun
  • A scarf that is worn looped or tied around the neck. 

red scarf

noun
  • Used other than figuratively or idiomatically: see red, scarf. 

  • A neckerchief worn by a young pioneer, typically red in colour. 

  • A young pioneer. 

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