bleached vs dirty blonde

bleached

adj
  • Having the hair lightened by bleaching. 

  • Faded or washed out by weather and strong sunlight. 

  • Whitened; made white using bleach 

dirty blonde

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

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

  • A person with dark blonde hair. 

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