short form vs truncation

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. 

truncation

noun
  • The act of truncating or shortening (for example, words are shortened to form blend words or portmanteaus). 

  • The removal of the least significant digits from a decimal number. 

  • The replacement of a solid angle by a plane, or a similar operation in other dimensions. 

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