dirty laundry vs wash basket

dirty laundry

noun
  • A clothes hamper or other container in which soiled laundry is placed. 

  • Used other than figuratively or idiomatically: see dirty, laundry. 

  • Unflattering or embarrassing facts, or questionable activities that one wants to remain secret, but which someone else may use as blackmail. 

wash basket

noun
  • A basket or container of some kind used to store dirty clothes before they are washed. 

  • The perforated container that holds the washing in a washing machine. 

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