Base difficulty: Level 25 edit
Level distribution for verb (development): 25: 14 27: 1 29: 1
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Extended (2 of 2) | 1600 |
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 |
43.95 | 1957 | 100% | 1957 | 1 |
20th_books |
46.15 | 2014 | 100% | 1789 | 2 |
wiki_vital |
62.68 | 2210 | 100% | 2210 | 1 |
wiki_math |
18.10 | 3852 | 100% | 3852 | 1 |
wiki_geography |
42.82 | 2817 | 100% | 2817 | 1 |
wiki_biology |
0.00 | — | — | — | 0 |
wiki_modern_life |
46.64 | 3073 | 100% | 3073 | 1 |
early_modern_science |
158.43 | 689 | 100% | 689 | 1 |
religious_translated |
51.39 | 1854 | 100% | 1854 | 1 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
14.57 | 5251 | 100% | 5251 | 1 |
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.