Base difficulty: Level 299 edit
Level distribution for verb (development): 30: 1 165: 2 170: 1 179: 1 196: 1 249: 1 278: 1 299: 2 300: 1 329: 1 470: 7 475: 1 1399: 6
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
cefr |
B1 (3 of 6) | 4200 |
Rank used = synthetic rank this tier contributes to the combined frequency rank (lower = more common).
Corpus Frequency
| Corpus | Freq (per M) | Best form | Share | Zipf rank | Forms |
|---|---|---|---|---|---|
19th_books |
7.52 | 7891 | 100% | 7891 | 1 |
20th_books |
8.41 | 7124 | 100% | 7124 | 1 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
0.00 | — | — | — | 0 |
wiki_modern_life |
0.00 | — | — | — | 0 |
wiki_arts |
0.00 | — | — | — | 0 |
wiki_society |
22.99 | 5375 | 100% | 5375 | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
0.00 | — | — | — | 0 |
wiki_history |
31.08 | 4171 | 100% | 4171 | 1 |
early_modern_science |
0.00 | — | — | — | 0 |
religious_translated |
52.65 | 3140 | 100% | 1647 | 2 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
5.06 | 9904 | 100% | 9904 | 1 |
eu_parliament_debates |
285.58 | 952 | 100% | 391 | 4 |
openstax_science |
0.00 | — | — | — | 0 |
openstax_society |
28.94 | 4022 | 100% | 4022 | 1 |
wpa_life_histories |
0.00 | — | — | — | 0 |
Best form = the single best-ranked form in the corpus, share-blind — how the spelling itself ranked. Share = how much of that spelling belongs to this lemma, when several senses compete for it. Zipf rank = all the forms combined (variant spellings included), each scaled by its share, and what feeds the combined frequency rank. Combining forms improves on the best form, but a share below 100% pushes the other way and usually wins: a sense holding a small slice of a common spelling is a rare word, so its rank lands downrated below the best form — and once it falls past what the corpus can support it is capped at the rank an unlisted word would get.