Base Difficulty

Base difficulty: Level 1217 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: 9099 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Movers (2 of 3) 750
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 4.56 682 3% 20000 capped 2
20th_books 5.83 546 3% 17563 downrated 2
wiki_math 0.00 — — — 0
wiki_geography 43.49 96 3% 2269 downrated 3
wiki_biology 4.65 1666 3% 9000 capped 2
wiki_modern_life 3.96 1599 3% 10000 capped 2
wiki_arts 1.28 3029 3% 10000 capped 1
wiki_society 2.56 2393 3% 11000 capped 2
wiki_linguistics 2.13 2270 3% 9000 capped 2
wiki_physical_science 8.58 807 3% 8000 capped 2
wiki_history 4.13 1203 3% 9000 capped 2
early_modern_science 10.47 391 3% 10400 capped 2
religious_translated 6.42 817 3% 10400 capped 2
cooking 0.00 — — — 0
legal_scotus 0.84 4346 3% 20000 capped 2
eu_parliament_debates 0.88 3938 3% 11000 capped 2
openstax_science 0.91 3646 3% 11000 capped 1
openstax_society 1.84 3454 3% 11000 capped 2
wpa_life_histories 11.34 306 3% 9975 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.