abluent vs fumigant

abluent

noun

  • A detergent. 

adj

  • Washing away; carrying off impurities; detergent. 

fumigant

noun

  • Any substance used, in the gaseous state, to fumigate or disinfect. 

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