Base difficulty: Level 6 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 |
Starters (1 of 3) | 325 |
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 |
179.02 | 555 | 100% | 555 | 1 |
20th_books |
253.63 | 408 | 100% | 408 | 1 |
wiki_math |
111.67 | 1129 | 100% | 1129 | 1 |
wiki_geography |
1024.97 | 95 | 100% | 95 | 1 |
wiki_biology |
546.76 | 189 | 100% | 189 | 1 |
wiki_modern_life |
527.23 | 180 | 100% | 180 | 1 |
wiki_arts |
455.83 | 218 | 100% | 218 | 1 |
wiki_society |
477.23 | 204 | 100% | 204 | 1 |
wiki_linguistics |
157.75 | 801 | 100% | 801 | 1 |
wiki_physical_science |
469.96 | 262 | 100% | 262 | 1 |
wiki_history |
1013.18 | 88 | 100% | 88 | 1 |
early_modern_science |
406.24 | 262 | 100% | 262 | 1 |
religious_translated |
277.84 | 389 | 100% | 389 | 1 |
cooking |
80.44 | 1332 | 100% | 1332 | 1 |
legal_scotus |
379.33 | 320 | 100% | 320 | 1 |
eu_parliament_debates |
737.09 | 170 | 100% | 170 | 1 |
openstax_science |
206.57 | 684 | 100% | 684 | 1 |
openstax_society |
568.68 | 195 | 100% | 195 | 1 |
wpa_life_histories |
774.41 | 159 | 100% | 159 | 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.