reconstruction vs short form

reconstruction

noun
  • A result of linguistic reconstruction; a model representing an unattested linguistic unit: a phoneme, a morpheme or a word. 

  • The act of restoring something to an earlier state. 

  • A result of an attempt to understand in detail how a certain result or event occurred. 

  • A thing that has been reconstructed or restored to an earlier state. 

short form

noun
  • A word with the same meaning as another formed by removing one or more of the syllables of the longer word, and considered a word in its own right rather than an abbreviation. 

  • Particularly in Slavic languages, a shortened form of the adjective, used predicatively. 

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