abbreviation vs apheresis

abbreviation

noun
  • A shortened or contracted form of a word or phrase, used to represent the whole, utilizing omission of letters, and sometimes substitution of letters, or duplication of initial letters to signify plurality, including signs such as +, =, @. 

  • The process of abbreviating. 

  • Reduction to lower terms, as a fraction. 

  • Any convenient short form used as a substitution for an understood or inferred whole. 

  • Loss during evolution of the final stages of the ancestral ontogenetic pattern. 

  • One or more dashes through the stem of a note, dividing it respectively into quavers, semiquavers, demisemiquavers, or hemidemisemiquavers. 

  • The result of shortening or reducing; abridgment. 

  • A notation used in music score to denote a direction, as pp or mf. 

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). 

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