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 |
Extended (2 of 2) | 1600 |
cambridge_yle |
Movers (2 of 3) | 750 |
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 |
123.97 | 760 | 100% | 760 | 1 |
20th_books |
101.28 | 948 | 100% | 948 | 1 |
wiki_math |
54.67 | 1845 | 100% | 1845 | 1 |
wiki_geography |
216.31 | 546 | 100% | 546 | 1 |
wiki_biology |
322.98 | 361 | 100% | 361 | 1 |
wiki_modern_life |
322.10 | 334 | 100% | 334 | 1 |
wiki_arts |
194.24 | 631 | 100% | 631 | 1 |
wiki_society |
266.30 | 413 | 100% | 413 | 1 |
wiki_linguistics |
198.17 | 642 | 100% | 642 | 1 |
wiki_physical_science |
218.85 | 651 | 100% | 651 | 1 |
wiki_history |
487.95 | 186 | 100% | 186 | 1 |
early_modern_science |
145.00 | 754 | 100% | 754 | 1 |
religious_translated |
146.11 | 730 | 100% | 730 | 1 |
cooking |
36.26 | 2135 | 100% | 2135 | 1 |
legal_scotus |
191.12 | 676 | 100% | 676 | 1 |
eu_parliament_debates |
72.50 | 1561 | 100% | 1561 | 1 |
openstax_science |
213.21 | 657 | 100% | 657 | 1 |
openstax_society |
514.69 | 223 | 100% | 223 | 1 |
wpa_life_histories |
322.84 | 353 | 100% | 353 | 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.