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 |
34.07 | 4514 | 100% | 2312 | 3 |
20th_books |
25.85 | 5680 | 100% | 2719 | 3 |
wiki_vital |
239.98 | 1341 | 100% | 549 | 3 |
wiki_math |
69.00 | 2287 | 100% | 1418 | 2 |
wiki_geography |
164.48 | 1820 | 100% | 758 | 3 |
wiki_biology |
102.66 | 2335 | 100% | 1284 | 2 |
wiki_modern_life |
381.25 | 817 | 100% | 328 | 4 |
early_modern_science |
59.08 | 2469 | 100% | 1709 | 2 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
118.97 | 1863 | 100% | 818 | 3 |
legal_scotus |
30.60 | 4574 | 100% | 2753 | 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.