Base difficulty: Level 221 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 |
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 |
133.86 | 703 | 100% | 703 | 1 |
20th_books |
91.88 | 1022 | 100% | 1022 | 1 |
wiki_math |
50.02 | 1984 | 100% | 1984 | 1 |
wiki_geography |
55.72 | 2269 | 100% | 2269 | 1 |
wiki_biology |
68.07 | 1993 | 100% | 1993 | 1 |
wiki_modern_life |
205.78 | 607 | 100% | 607 | 1 |
wiki_arts |
129.61 | 1003 | 100% | 1003 | 1 |
wiki_society |
188.89 | 646 | 100% | 646 | 1 |
wiki_linguistics |
91.51 | 1315 | 100% | 1315 | 1 |
wiki_physical_science |
57.99 | 2362 | 100% | 2362 | 1 |
wiki_history |
83.53 | 1553 | 100% | 1553 | 1 |
early_modern_science |
270.06 | 399 | 100% | 399 | 1 |
religious_translated |
186.48 | 569 | 100% | 569 | 1 |
cooking |
235.67 | 586 | 100% | 586 | 1 |
legal_scotus |
643.11 | 156 | 100% | 156 | 1 |
eu_parliament_debates |
123.36 | 976 | 100% | 976 | 1 |
openstax_science |
53.10 | 2434 | 100% | 2434 | 1 |
openstax_society |
144.64 | 982 | 100% | 982 | 1 |
wpa_life_histories |
50.07 | 1804 | 100% | 1804 | 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.