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 |
86.17 | 1072 | 100% | 1072 | 1 |
20th_books |
98.72 | 972 | 100% | 972 | 1 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
306.99 | 369 | 100% | 369 | 1 |
wiki_biology |
305.60 | 380 | 100% | 380 | 1 |
wiki_modern_life |
88.38 | 1646 | 100% | 1646 | 1 |
wiki_arts |
29.25 | 4150 | 100% | 4150 | 1 |
wiki_society |
34.79 | 3745 | 100% | 3745 | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
152.03 | 955 | 100% | 955 | 1 |
wiki_history |
78.55 | 1648 | 100% | 1648 | 1 |
early_modern_science |
147.30 | 743 | 100% | 743 | 1 |
religious_translated |
46.67 | 2027 | 100% | 2027 | 1 |
cooking |
89.51 | 1238 | 100% | 1238 | 1 |
legal_scotus |
0.00 | — | — | — | 0 |
eu_parliament_debates |
12.05 | 4692 | 100% | 4692 | 1 |
openstax_science |
37.75 | 3220 | 100% | 3220 | 1 |
openstax_society |
38.32 | 3198 | 100% | 3198 | 1 |
wpa_life_histories |
255.62 | 432 | 100% | 432 | 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.