apheresis vs preterition

apheresis

noun
  • Elision, suppression, or complete loss of a letter or sound (syllable) from the beginning of a word, such as the development of special from especial; procope. 

  • The removal of blood from a patient, and the removal of certain components (such as platelets) from that blood, followed by the transfusion of the filtered blood back to the donor (patient). 

preterition

noun
  • Synonym of paralipsis 

  • The failure of a testator to name a legal heir in his will. 

  • The doctrine that God passes over the non-elect in electing to eternal life those predestinated to salvation. 

  • The act of passing by, disregarding or omitting. 

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