Base difficulty: Level 270 edit
Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 1399: 66
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Basic (1 of 2) | 600 |
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 |
123.29 | 776 | 100% | 776 | 1 |
20th_books |
61.63 | 1497 | 100% | 1497 | 1 |
wiki_math |
264.47 | 504 | 100% | 504 | 1 |
wiki_geography |
63.60 | 2221 | 100% | 2221 | 1 |
wiki_biology |
44.74 | 2999 | 100% | 2999 | 1 |
wiki_modern_life |
36.93 | 3816 | 100% | 3816 | 1 |
wiki_arts |
110.67 | 1250 | 100% | 1250 | 1 |
wiki_society |
308.43 | 364 | 100% | 364 | 1 |
wiki_linguistics |
97.81 | 1326 | 100% | 1326 | 1 |
wiki_physical_science |
157.88 | 921 | 100% | 921 | 1 |
wiki_history |
120.84 | 1078 | 100% | 1078 | 1 |
early_modern_science |
227.05 | 477 | 100% | 477 | 1 |
religious_translated |
193.18 | 562 | 100% | 562 | 1 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
151.38 | 870 | 100% | 870 | 1 |
eu_parliament_debates |
69.80 | 1599 | 100% | 1599 | 1 |
openstax_science |
56.94 | 2285 | 100% | 2285 | 1 |
openstax_society |
105.41 | 1324 | 100% | 1324 | 1 |
wpa_life_histories |
16.81 | 4443 | 100% | 4443 | 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.