fractionate vs lixiviate

fractionate

verb
  • To separate (a mixture) into its individual constituents by exploiting differences in some chemical or physical property, such as boiling point, particle size, solubility etc. 

  • To divide a total dose of radiation into fractions. 

  • To use the technique of fractionation in hypnosis. 

  • To divide each plaintext symbol into several ciphertext symbols as a preliminary stage of encryption. 

lixiviate

verb
  • To separate (a substance) into soluble and insoluble components through percolation; to leach. 

noun
  • leachate 

adj
  • Impregnated with salts from wood ashes. 

  • Of or relating to lye or lixivium; of the quality of alkaline salts. 

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