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: 1279 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 64.34 2272 100% 1329 2
20th_books 72.98 1762 100% 1168 2
wiki_math 26.49 3022 100% 3022 1
wiki_geography 116.09 1958 100% 1200 2
wiki_biology 302.98 395 100% 395 1
wiki_modern_life 264.01 831 100% 530 2
wiki_arts 140.41 1603 100% 984 2
wiki_society 24.09 5164 100% 5164 1
wiki_linguistics 34.17 3153 100% 3153 1
wiki_physical_science 90.45 1607 100% 1607 1
wiki_history 41.62 3237 100% 3237 1
early_modern_science 40.23 2677 100% 2677 1
religious_translated 37.90 3692 100% 2098 2
cooking 29.29 2425 100% 2425 1
legal_scotus 234.49 710 100% 538 2
eu_parliament_debates 0.00 — — — 0
openstax_science 83.07 2159 100% 1484 2
openstax_society 0.00 — — — 0
wpa_life_histories 121.71 982 100% 771 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.