Base difficulty: Level 22 edit
Level distribution for noun (time_period): 6: 4 22: 25 220: 15 405: 3 1030: 2 1050: 1 1070: 1 1120: 4 1200: 1 1202: 2
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 |
128.12 | 727 | 100% | 727 | 1 |
20th_books |
110.25 | 867 | 100% | 867 | 1 |
wiki_math |
59.32 | 1753 | 100% | 1753 | 1 |
wiki_geography |
108.33 | 1196 | 100% | 1196 | 1 |
wiki_biology |
58.30 | 2324 | 100% | 2324 | 1 |
wiki_modern_life |
143.61 | 964 | 100% | 964 | 1 |
wiki_arts |
137.77 | 933 | 100% | 933 | 1 |
wiki_society |
228.42 | 512 | 100% | 512 | 1 |
wiki_linguistics |
312.14 | 397 | 100% | 397 | 1 |
wiki_physical_science |
122.28 | 1184 | 100% | 1184 | 1 |
wiki_history |
201.01 | 569 | 100% | 569 | 1 |
early_modern_science |
110.48 | 1032 | 100% | 1032 | 1 |
religious_translated |
129.77 | 806 | 100% | 806 | 1 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
248.79 | 513 | 100% | 513 | 1 |
eu_parliament_debates |
840.30 | 138 | 100% | 138 | 1 |
openstax_science |
129.01 | 1096 | 100% | 1096 | 1 |
openstax_society |
250.96 | 543 | 100% | 543 | 1 |
wpa_life_histories |
63.56 | 1498 | 100% | 1498 | 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.