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 |
|---|---|---|
cambridge_yle |
Flyers (3 of 3) | 1200 |
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 |
115.29 | 1284 | 100% | 873 | 3 |
20th_books |
104.49 | 1337 | 100% | 949 | 3 |
wiki_vital |
48.57 | 2786 | 100% | 2786 | 1 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
31.26 | 3630 | 100% | 3630 | 1 |
wiki_biology |
109.45 | 1665 | 100% | 1191 | 2 |
wiki_modern_life |
163.88 | 1369 | 100% | 798 | 3 |
early_modern_science |
121.22 | 1331 | 100% | 908 | 3 |
religious_translated |
204.99 | 751 | 100% | 549 | 2 |
cooking |
1082.03 | 258 | 100% | 162 | 3 |
legal_scotus |
74.32 | 2340 | 100% | 1575 | 3 |
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.