abridgment vs short form

abridgment

noun
  • An epitome or compend, as of a book; a shortened or abridged form; an abbreviation. 

  • The state of being abridged or lessened. 

  • The leaving out of certain portions of a plaintiff's demand, the writ still holding good for the remainder. 

  • The act of abridging; reduction or deprivation 

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 abridgment and short form occurred in a corpus of books? (source: Google Ngram Viewer )