abstergent vs vacuum cleaner

abstergent

noun
  • A substance used to cleanse; a detergent. 

adj
  • Cleansing, detergent. 

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 abstergent and vacuum cleaner occurred in a corpus of books? (source: Google Ngram Viewer )