Base difficulty: Level 11 edit
Level distribution for noun (natural_feature): 10: 2 11: 1 135: 25 165: 1 219: 26 254: 1 330: 1 1010: 1 1020: 7 1050: 9 1221: 1 1399: 6
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
cambridge_yle |
Movers (2 of 3) | 750 |
cefr |
A2 (2 of 6) | 2100 |
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 |
10.55 | 6317 | 100% | 6317 | 1 |
20th_books |
5.26 | 9753 | 100% | 9753 | 1 |
wiki_math |
38.00 | 2464 | 100% | 2464 | 1 |
wiki_geography |
609.58 | 400 | 100% | 201 | 2 |
wiki_biology |
439.43 | 496 | 100% | 298 | 2 |
wiki_modern_life |
510.48 | 286 | 100% | 220 | 2 |
wiki_arts |
0.00 | — | — | — | 0 |
wiki_society |
0.00 | — | — | — | 0 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
1749.78 | 70 | 100% | 55 | 2 |
wiki_history |
0.00 | — | — | — | 0 |
early_modern_science |
214.80 | 501 | 100% | 501 | 1 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
221.93 | 605 | 100% | 605 | 1 |
legal_scotus |
0.00 | — | — | — | 0 |
eu_parliament_debates |
0.00 | — | — | — | 0 |
openstax_science |
1109.78 | 107 | 100% | 88 | 2 |
openstax_society |
23.95 | 4620 | 100% | 4620 | 1 |
wpa_life_histories |
10.75 | 5750 | 100% | 5750 | 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.