apheresis vs exception

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). 

exception

noun
  • The act of excepting or excluding; exclusion; restriction by taking out something which would otherwise be included, as in a class, statement, rule. 

  • An objection; cavil; dissent; disapprobation; offense; cause of offense; — usually followed by to or against. 

  • An objection, on legal grounds; also, as in conveyancing, a clause by which the grantor excepts or reserves something before the right is transferred. 

  • An interruption in normal processing, typically caused by an error condition, that can be raised ("thrown") by one part of the program and handled ("caught") by another part. 

  • That which is excluded from others; a person, thing, or case, specified as distinct, or not included. 

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