dishwasher vs washing powder

dishwasher

noun
  • A machine for washing dishes. 

  • A European bird, the wagtail. 

  • Someone who washes dishes, especially one hired to wash dishes in a restaurant. 

  • A bird, the restless flycatcher (Myiagra inquieta). 

washing powder

noun
  • A powder used in washing clothes, etc.; a detergent. 

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