dry cleaner vs purifier

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. 

purifier

noun
  • A person or device that purifies (by removing impurities) 

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