Base difficulty: Level 405 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 1399: 14
No difficulty overrides set. The base difficulty level will be used for all languages.
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Extended (2 of 2) | 1600 |
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 |
14.75 | 227 | 3% | 7794 downrated | 1 |
20th_books |
15.09 | 234 | 3% | 8034 downrated | 1 |
wiki_math |
6.94 | 575 | 3% | 8000 capped | 1 |
wiki_geography |
9.68 | 357 | 3% | 9000 capped | 1 |
wiki_biology |
6.20 | 613 | 3% | 9000 capped | 1 |
wiki_modern_life |
8.31 | 400 | 3% | 10000 capped | 1 |
wiki_arts |
7.28 | 472 | 3% | 10000 capped | 1 |
wiki_society |
5.29 | 711 | 3% | 11000 capped | 1 |
wiki_linguistics |
5.96 | 648 | 3% | 9000 capped | 1 |
wiki_physical_science |
8.26 | 485 | 3% | 8000 capped | 1 |
wiki_history |
6.56 | 529 | 3% | 9000 capped | 1 |
early_modern_science |
15.32 | 194 | 3% | 6661 downrated | 1 |
religious_translated |
3.28 | 927 | 3% | 10400 capped | 1 |
cooking |
166.09 | 20 | 3% | 687 downrated | 1 |
legal_scotus |
1.40 | 2413 | 3% | 20000 capped | 1 |
eu_parliament_debates |
3.29 | 1063 | 3% | 11000 capped | 1 |
openstax_science |
7.44 | 536 | 3% | 11000 capped | 1 |
openstax_society |
5.89 | 697 | 3% | 11000 capped | 1 |
wpa_life_histories |
10.89 | 313 | 3% | 10746 downrated | 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.