Edith Wharton · 1862
Heavy going at CET-4 level. Not unreadable — just not readable the look-every-word-up way.
Coverage = the share of words in the text you already know. The research gives two lines: 98% before independent fluent reading is realistic, 95% for the instructional level that needs support (Hu & Nation, 2000). Proper nouns are not counted as unknown — recognising that it is a name is enough; this book has 670 of them.
Advanced — read it with glosses. 101,404 words in total; at 150 words a minute for a non-native reader, about 11 h 16 min to finish. Average sentence length 17.5 words. This book is heavy on rare, archaic and invented words: even 25,000 high-frequency word families will not reach 95% coverage — its difficulty is not in the common vocabulary.
The opening of The Age of Innocence, word for word. Tap any word you don't know and its meaning here appears beside it — no sign-up, tap as often as you like.
On a January evening of the early seventies, Christine Nilsson was singing in Faust at the Academy of Music in New York.
Though there was already talk of the erection, in remote metropolitan distances "above the Forties," of a new Opera House which should compete in costliness and splendour with those of the great European capitals, the world of fashion was still content to reassemble every winter in the shabby red and gold boxes of the sociable old Academy. Conservatives cherished it for being small and inconvenient, and thus keeping out the "new people" whom New York was beginning to dread and yet be drawn to; and the sentimental clung to it for its historic associations, and the musical for its excellent acoustics, always so problematic a quality in halls built for the hearing of music.
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Ordered by unknown words per 100. Lower reads easier; to step up a level, pick a higher number.
Computed by Readii from the public-domain text (updated 2026-10-21), not estimated by hand. The Readii reading level is our own scale, anchored on unknown-word density; it is not the same system as Lexile or AR and does not convert directly. Unknown words are measured against the CET-4 ∪ Gaokao lists, so this is difficulty for a Chinese-speaking learner, not a native-child reading level.