abluent vs abrasive

abluent

adj
  • Washing away; carrying off impurities; detergent. 

noun
  • A detergent. 

abrasive

adj
  • Producing abrasion; rough enough to wear away the outer surface. 

  • Being rough and coarse in manner or disposition; overly aggressive and causing irritation. 

noun
  • A hard inorganic substance or material consisting in powder or granule form such as sandpaper, pumice, or emery, used for cleaning, smoothing, or polishing. 

  • Rock fragments, sand grains, mineral particles, used by water, wind, and ice to abrade a land surface. 

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