Base difficulty: Level 20 edit
Level distribution for noun (concept_idea): 19: 2 20: 3 26: 1 27: 1 221: 29 270: 31 274: 37 275: 31 280: 29 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 7 1120: 1
No difficulty overrides set. The base difficulty level will be used for all languages.
Add Difficulty Override
python -m storage.admin --calc-ranks to populate)
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 |
315.95 | 329 | 100% | 329 | 1 |
20th_books |
443.58 | 259 | 100% | 259 | 1 |
wiki_math |
17.45 | 3846 | 100% | 3846 | 1 |
wiki_geography |
51.22 | 2422 | 100% | 2422 | 1 |
wiki_biology |
0.00 | — | — | — | 0 |
wiki_modern_life |
89.89 | 1623 | 100% | 1623 | 1 |
wiki_arts |
142.53 | 897 | 100% | 897 | 1 |
wiki_society |
299.64 | 365 | 100% | 365 | 1 |
wiki_linguistics |
30.32 | 3214 | 100% | 3214 | 1 |
wiki_physical_science |
0.00 | — | — | — | 0 |
wiki_history |
200.18 | 571 | 100% | 571 | 1 |
early_modern_science |
50.64 | 2117 | 100% | 2117 | 1 |
religious_translated |
77.78 | 1306 | 100% | 1306 | 1 |
cooking |
46.45 | 1839 | 100% | 1839 | 1 |
legal_scotus |
237.34 | 537 | 100% | 537 | 1 |
eu_parliament_debates |
363.59 | 335 | 100% | 335 | 1 |
openstax_science |
20.74 | 4941 | 100% | 4941 | 1 |
openstax_society |
645.74 | 175 | 100% | 175 | 1 |
wpa_life_histories |
993.68 | 134 | 100% | 134 | 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.