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 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 |
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 |
86.89 | 1080 | 100% | 1080 | 1 |
20th_books |
97.59 | 1011 | 100% | 1011 | 1 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
394.50 | 423 | 100% | 320 | 2 |
wiki_biology |
331.27 | 398 | 100% | 363 | 2 |
wiki_modern_life |
89.14 | 1656 | 100% | 1656 | 1 |
wiki_arts |
26.18 | 4885 | 100% | 4885 | 1 |
wiki_society |
32.88 | 4102 | 100% | 4102 | 1 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
148.17 | 986 | 100% | 986 | 1 |
wiki_history |
73.91 | 1854 | 100% | 1854 | 1 |
early_modern_science |
148.77 | 752 | 100% | 752 | 1 |
religious_translated |
46.99 | 2057 | 100% | 2057 | 1 |
cooking |
89.00 | 1242 | 100% | 1242 | 1 |
legal_scotus |
0.00 | — | — | — | 0 |
eu_parliament_debates |
12.00 | 5093 | 100% | 5093 | 1 |
openstax_science |
37.80 | 3219 | 100% | 3219 | 1 |
openstax_society |
38.41 | 3195 | 100% | 3195 | 1 |
wpa_life_histories |
276.36 | 432 | 100% | 385 | 2 |
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.