haplology vs short form

haplology

noun
  • An instance of deleting one of two almost identical syllables within a word. 

  • The process of deleting one of two almost identical syllables within a word. 

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