Base Difficulty

Base difficulty: Level 1226 edit

Level distribution for noun (spatial_division): 249: 11 254: 2 350: 1 460: 1 1078: 1 1200: 4 1201: 1 1202: 3 1203: 2 1204: 9 1206: 3 1207: 4 1208: 1 1209: 5 1210: 4 1211: 4 1212: 1 1213: 1 1217: 2 1219: 1 1220: 1 1226: 5 1399: 9

Per-Language Difficulty Overrides

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

Add Difficulty Override
-1 to exclude, 1-1399 for level
Frequency and Tier Signals
Combined Frequency Rank: 10137 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 1.81 408 1% 20000 capped 2
20th_books 1.46 518 1% 20000 capped 2
wiki_math 20.68 52 1% 5367 downrated 2
wiki_geography 2.98 281 1% 9000 capped 2
wiki_biology 1.30 824 1% 9000 capped 2
wiki_modern_life 4.56 191 1% 10000 capped 2
wiki_arts 2.39 401 1% 10000 capped 2
wiki_society 2.02 523 1% 11000 capped 2
wiki_linguistics 2.05 540 1% 9000 capped 2
wiki_physical_science 6.61 111 1% 8000 capped 2
wiki_history 2.20 440 1% 9000 capped 2
early_modern_science 4.21 209 1% 10400 capped 2
religious_translated 1.10 875 1% 10400 capped 2
cooking 3.21 350 1% 5200 capped 2
legal_scotus 3.78 246 1% 20000 capped 2
eu_parliament_debates 6.71 147 1% 11000 capped 2
openstax_science 5.22 152 1% 11000 capped 2
openstax_society 3.23 271 1% 11000 capped 2
wpa_life_histories 1.10 800 1% 20000 capped 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.