dirty blonde vs dishwater blond

dirty blonde

noun
  • A person with dark blonde hair. 

  • A dark shade of blonde, bordering on light brown. 

adj
  • Of a dark blonde colour/color bordering on light brown. 

dishwater blond

noun
  • A person with dark blond hair. 

  • A dark shade of blond, bordering on light brown. 

adj
  • Of a dark blond colour/color bordering on light brown. 

How often have the words dirty blonde and dishwater blond occurred in a corpus of books? (source: Google Ngram Viewer )