Base Difficulty

Base difficulty: Level 380 edit

Level distribution for noun (quantitative_concept): 20: 1 162: 24 276: 25 380: 25 390: 1 456: 1 1000: 1 1050: 2 1070: 2 1080: 10 1090: 1 1110: 1 1202: 2 1203: 1 1204: 2 1206: 1 1210: 2 1211: 1 1213: 7 1218: 1 1225: 2 1226: 1

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
cefr B1 (3 of 6) 4200

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 13.43 3895 50% 5138 downrated 2
20th_books 14.21 3683 50% 4751 downrated 2
wiki_math 12.80 3054 50% 6108 downrated 1
wiki_geography 14.54 3856 50% 7712 downrated 1
wiki_biology 0.00 — — — 0
wiki_modern_life 68.23 1546 50% 2111 downrated 2
wiki_arts 86.74 894 50% 1460 downrated 2
wiki_society 0.00 — — — 0
wiki_linguistics 9.82 4316 50% 8632 downrated 1
wiki_physical_science 0.00 — — — 0
wiki_history 28.26 2259 50% 4518 downrated 1
early_modern_science 16.11 5056 50% 5056 2
religious_translated 0.00 — — — 0
cooking 27.19 1679 50% 3358 downrated 1
legal_scotus 19.15 3605 50% 4505 downrated 2
eu_parliament_debates 4.96 5181 50% 10362 downrated 1
openstax_science 30.28 3392 50% 3788 downrated 2
openstax_society 38.53 3105 50% 3193 downrated 2
wpa_life_histories 8.00 6019 50% 7123 downrated 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.