abstergent vs detergent

abstergent

adj
  • Cleansing, detergent. 

noun
  • A substance used to cleanse; a detergent. 

detergent

adj
  • Synonym of cleansing. 

noun
  • Any non-soap cleaning agent, especially a synthetic surfactant. 

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