dry cleaner vs vacuum cleaner

dry cleaner

noun
  • A person whose business is the dry cleaning of clothes and other fabrics. 

  • A business establishment that engages in the dry cleaning of clothes and other fabrics. 

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. 

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