admixture vs infiltration

admixture

noun
  • An instance of admixing, a mixing in of something. 

  • a mixture composed of entities retaining their individual properties. 

  • A mixing-in of a biologically or genetically differentiated group to an established stock. 

  • A mixture, in some contexts 

infiltration

noun
  • The act or process of infiltrating, as of water into a porous substance, or of a fluid into the cells of an organ or part of the body. 

  • The substance which has entered the pores or cavities of a body. 

  • The act of secretly entering a physical location and/or organization. 

  • process by which water on the ground surface enters the soil. 

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