abluent vs detergent

abluent

adj
  • Washing away; carrying off impurities; detergent. 

noun
  • A detergent. 

detergent

adj
  • Synonym of cleansing. 

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

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