cleaning vs ironing

cleaning

noun
  • The process of making something clean. 

  • The afterbirth of cows, ewes, etc. 

ironing

noun
  • Laundry that has been washed and is ready to be ironed. 

  • The act of pressing clothes with an iron. 

  • Laundry that has recently been ironed. 

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