vacuum cleaner vs washing-up liquid

vacuum cleaner

noun
  • A domestic or industrial mobile machine for cleaning floors and similar surfaces that draws dust and other particles into a container (a cyclonic type bin, or a filter bag) by the suction created by an electric motor driving a fan. 

washing-up liquid

noun
  • A form of liquid soap used to wash dishes by hand. 

How often have the words vacuum cleaner and washing-up liquid occurred in a corpus of books? (source: Google Ngram Viewer )