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 |
215.35 | 474 | 100% | 474 | 1 |
20th_books |
160.47 | 633 | 100% | 633 | 1 |
wiki_math |
0.00 | — | — | — | 0 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
47.07 | 2835 | 100% | 2835 | 1 |
wiki_modern_life |
75.81 | 1928 | 100% | 1928 | 1 |
wiki_arts |
84.36 | 1574 | 100% | 1574 | 1 |
wiki_society |
0.00 | — | — | — | 0 |
wiki_linguistics |
0.00 | — | — | — | 0 |
wiki_physical_science |
62.02 | 2228 | 100% | 2228 | 1 |
wiki_history |
36.59 | 3343 | 100% | 3343 | 1 |
early_modern_science |
166.48 | 655 | 100% | 655 | 1 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
219.81 | 617 | 100% | 617 | 1 |
legal_scotus |
10.41 | 6386 | 100% | 6386 | 1 |
eu_parliament_debates |
26.44 | 3057 | 100% | 3057 | 1 |
openstax_science |
50.61 | 2543 | 100% | 2543 | 1 |
openstax_society |
20.19 | 5175 | 100% | 5175 | 1 |
wpa_life_histories |
98.54 | 1002 | 100% | 1002 | 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.