Thatsa lotta questions.
OK here's some details.
I selected some words from the ransom note, basically dropped the most common words, and words that are specific to a ransom note e.g. dollars, money, unharmed. I kept these words listed below because they are less common and not much hint of the subject matter of kidnapping:
situation, stray, individuals, southern, gentlemen, rested, exhausting, remaining, serves, victory, possession, represent, scrutiny, deviation, adequate, constant, devices, must, arrange, advise, faction, provoke, immediate, denied, result, hence, underestimate, outsmart, particularly, respect, proper.
Then I did a frequency of usage of these RN vocabulary words in two large samples. One is from the subject exemplar and the other is from a book I just picked of similar size.
One of the authors used 16 of the 31 words in their book. Total occurrences of these ransom note words is 179 out of 120651 words. (situation 34, individuals 1, southern 3, gentlemen 3, rested 3, remaining 3, victory 4, constant 6, must 77, arrange 2, immediate 7, result 11, hence 1, particularly 12, respect 9, proper 3).
The other author used 19 of the 31 words in their book. Total occurrences of the same ransom note words is 1151 of 120772 words (situation 83, stray 2, individuals 11, remaining 4, serves 10, victory 22, represent 32, deviation 5, adequate 19, constant 6, must 814, arrange 11, provoke 2, immediate 7, result 48, hence 6, particularly 29, respect 5, proper 35).