Based on wooorm/readibility. Split out creating grade results for the formulas.
automated-readability
� Uses character count instead of error-prone syllable parsercoleman-liau
� Uses letter count instead of an error-prone syllable parserdale-chall-formula
� Uses a dictionary, suited for higher reading levelsflesch
� Uses syllable countflesch-kincaid
� Likeflesch-formula
, returns U.S. grade levelsgunning-fog
� Uses syllable count, hard to implement with a computer (needs POS-tagging and Named Entity Recognition)smog-formula
� Likegunning-fog-index
, without needing advanced NLPspache-formula
� Uses a dictionary, suited for lower reading levels