predecessor vs surrogate

predecessor

noun
  • A model or type of machinery or device which precedes the current (or later) one. Usually used to describe an earlier, outdated model. 

  • One who precedes; one who has preceded another in any state, position, office, etc.; one whom another follows or comes after, in any office or position. 

  • A vertex having a directed path to another vertex 

surrogate

adj
  • Of, concerning, relating to or acting as a substitute. 

noun
  • A politician or person of influence campaigning for a presidential candidate. 

  • Any of a range of Unicode codepoints which are used in pairs in UTF-16 to represent characters beyond the Basic Multilingual Plane. 

  • An ersatz good. 

  • A deputy for a bishop in granting licences for marriage. 

  • A person or animal that acts as a substitute for the social or pastoral role of another, such as a surrogate parent. 

  • A substitute (usually of a person, position or role). 

  • A judicial officer of limited jurisdiction, who administers matters of probate and intestate succession and, in some cases, adoptions. 

verb
  • To replace or substitute something with something else; to appoint a successor. 

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