predecessor vs sire

predecessor

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 Usually used to describe an earlier, outdated model. 

  • A vertex having a directed path to another vertex 

sire

noun
  • A lord, master, or other person in authority, most commonly used vocatively: formerly in speaking to elders and superiors, later only when addressing a sovereign. 

  • A male animal that has fathered a particular offspring (especially used of domestic animals and/or in biological research). 

verb
  • to father; to beget. 

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