housekeeping vs mopping

housekeeping

noun
  • The chores of maintaining a house as a residence, especially cleaning. 

  • Any general tasks that involve preparation. 

  • Hospitality; a liberal and hospitable table; a supply of provisions. 

mopping

noun
  • The process of cleaning with a mop. 

  • An application of molten asphalt to a roof etc. 

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