Pull a real study vocabulary list out of an assigned reading, sized for spaced repetition, not a glossary dump

Pull a vocabulary study list from the text below, but only the words actually worth memorizing for AP English Literature exam prep — need vocabulary that shows up across period-appropriate texts, not just this novel. — not every word that merely looks advanced.

SOURCE TEXT
Chapter 3 of 'The Great Gatsby' (paste or describe the excerpt), roughly 1,200 words covering Nick's first visit to Gatsby's party.

WHY I'M STUDYING THIS
AP English Literature exam prep — need vocabulary that shows up across period-appropriate texts, not just this novel.

WORDS I ALREADY KNOW (skip these even if they appear)
affluence, gaudy, wistful

TARGET LIST SIZE
15

Selection rule: include a word only if it's likely to recur in this subject area beyond this one text, or if not knowing it would block understanding a sentence in the passage — skip proper nouns, one-off technical terms unique to this exact passage, and words you judge I likely already know from context even if they weren't in my known-words list. For each selected word, give: the word as it appears in the text, a definition in plain language (not a dictionary-copy definition), the exact sentence from the source text it appeared in, and one new example sentence in a different context so I'm not just memorizing the original sentence shape. Format each entry as a front/back flashcard pair — front is the word alone, back is definition plus both example sentences — so this can be dropped directly into a spaced-repetition app without reformatting.

If the text is short enough that meeting the target count would force you to include marginal words just to hit the number, tell me the real count you'd recommend instead and explain briefly why, rather than padding the list to match what I asked for.

Output as a numbered flashcard list in the front/back format described, followed by one line noting any words you deliberately excluded that I might expect to see (like a word that looked hard but you judged as already-known from context).