Base difficulty: Level 219 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 |
|---|---|---|
basic_english |
Basic (1 of 2) | 600 |
cambridge_yle |
Flyers (3 of 3) | 1200 |
cefr |
A1 (1 of 6) | 800 |
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 |
4.56 | 877 | 4% | 20000 capped | 2 |
20th_books |
5.21 | 785 | 4% | 18291 downrated | 2 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
5.01 | 1513 | 4% | 9000 capped | 2 |
wiki_biology |
8.48 | 588 | 4% | 9000 capped | 1 |
wiki_modern_life |
7.66 | 893 | 4% | 10000 capped | 2 |
wiki_arts |
1.58 | 3310 | 4% | 10000 capped | 1 |
wiki_society |
1.48 | 3571 | 4% | 11000 capped | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
8.32 | 1047 | 4% | 8000 capped | 2 |
wiki_history |
2.83 | 1855 | 4% | 9000 capped | 1 |
early_modern_science |
6.92 | 925 | 4% | 10400 capped | 2 |
religious_translated |
6.26 | 959 | 4% | 10400 capped | 2 |
cooking |
3.42 | 1240 | 4% | 5200 capped | 1 |
legal_scotus |
0.22 | 9369 | 4% | 20000 capped | 1 |
eu_parliament_debates |
1.05 | 3123 | 4% | 11000 capped | 1 |
openstax_science |
2.40 | 2138 | 4% | 11000 capped | 1 |
openstax_society |
1.00 | 4371 | 4% | 11000 capped | 1 |
wpa_life_histories |
8.46 | 563 | 4% | 12245 downrated | 2 |
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.