apheresis vs apostrophe

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). 

apostrophe

noun
  • The text character ’, which serves as a punctuation mark in various languages and as a diacritical mark in certain rare contexts. 

  • A sudden exclamatory piece of dialogue addressed to someone or something, especially absent. 

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