Dale-Chall readability formula. See https://en.wikipedia.org/wiki/Dale-Chall_readability_formula
{ words : Basics.Float
, difficultWords : Basics.Float
, sentences : Basics.Float
}
Record that hold the required data to calculate a score.
configFromText : String -> Config
Generate a Config record from a text string.
score : Config -> Basics.Float
Get the Dale-Chall score for a Config record.
gradeLevel : Basics.Float -> String
Get the grade level for a Dale-Chall score.