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 |
70.67 | 1288 | 100% | 1288 | 1 |
20th_books |
91.88 | 1021 | 100% | 1021 | 1 |
wiki_math |
27.92 | 2882 | 100% | 2882 | 1 |
wiki_geography |
155.92 | 807 | 100% | 807 | 1 |
wiki_biology |
49.97 | 2687 | 100% | 2687 | 1 |
wiki_modern_life |
97.91 | 1485 | 100% | 1485 | 1 |
wiki_arts |
50.69 | 2574 | 100% | 2574 | 1 |
wiki_society |
95.99 | 1428 | 100% | 1428 | 1 |
wiki_linguistics |
42.10 | 2539 | 100% | 2539 | 1 |
wiki_physical_science |
101.61 | 1427 | 100% | 1427 | 1 |
wiki_history |
132.95 | 918 | 100% | 918 | 1 |
early_modern_science |
82.48 | 1384 | 100% | 1384 | 1 |
religious_translated |
155.36 | 678 | 100% | 678 | 1 |
cooking |
28.33 | 2530 | 100% | 2530 | 1 |
legal_scotus |
53.51 | 2150 | 100% | 2150 | 1 |
eu_parliament_debates |
64.93 | 1701 | 100% | 1701 | 1 |
openstax_science |
35.26 | 3386 | 100% | 3386 | 1 |
openstax_society |
67.99 | 2035 | 100% | 2035 | 1 |
wpa_life_histories |
239.62 | 456 | 100% | 456 | 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.