dry cleaner vs purification

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. 

purification

noun
  • The act or process of purifying; the removal of impurities. 

  • A religious act or rite in which a defiled person is made clean or free from sin. 

  • The pouring of wine into the chalice to rinse it after communion, the wine being then drunk by the priest. 

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