Base difficulty: Level 170 edit
Level distribution for noun (natural_object): 135: 2 160: 1 170: 2 195: 1 219: 1 290: 1 1399: 1
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
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 |
4.54 | 9509 | 80% | 11886 downrated | 1 |
20th_books |
5.05 | 8658 | 80% | 10822 downrated | 1 |
wiki_math |
13.86 | 3986 | 80% | 4982 downrated | 1 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
44.74 | 4243 | 80% | 2663 | 2 |
wiki_modern_life |
121.09 | 919 | 80% | 1149 downrated | 1 |
wiki_arts |
46.78 | 2374 | 80% | 2968 downrated | 1 |
wiki_society |
29.99 | 3662 | 80% | 4578 downrated | 1 |
wiki_linguistics |
24.08 | 3466 | 80% | 4332 downrated | 1 |
wiki_physical_science |
0.00 | — | — | — | 0 |
wiki_history |
0.00 | — | — | — | 0 |
early_modern_science |
0.00 | — | — | — | 0 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
0.00 | — | — | — | 0 |
eu_parliament_debates |
0.00 | — | — | — | 0 |
openstax_science |
48.21 | 2194 | 80% | 2742 downrated | 1 |
openstax_society |
20.17 | 4482 | 80% | 5602 downrated | 1 |
wpa_life_histories |
0.00 | — | — | — | 0 |
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.