paper towel vs washing machine

paper towel

noun
  • A sheet of absorbent paper dispensed in restrooms, usually used for drying washed hands. 

  • A sheet of absorbent paper, used for cleaning and food preparation, usually sold in and dispensed from rolls. 

washing machine

noun
  • A machine, usually automatic, that washes clothes, etc. 

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