apheresis vs gapping

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). 

gapping

noun
  • A type of ellipsis that occurs in the non-initial conjuncts of coordinate structures, and usually elides minimally a finite verb and further any non-finite verbs that are present. Example: "Some ate bread, and others rice." 

  • The formation of a gap. 

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