bagwash vs underwear

bagwash

noun
  • A type of laundry in which the washing was returned to the customer in a bag, undried and unpressed. 

underwear

noun
  • Clothes worn next to the skin, underneath outer clothing. 

  • Underpants (boxers, briefs, panties, etc) and often bras. 

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