Base Difficulty

Base difficulty: Level 460 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: 949 (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 9.92 5608 80% 7010 downrated 1
20th_books 17.84 4770 80% 3696 2
wiki_math 267.01 630 80% 505 2
wiki_geography 183.40 869 80% 742 2
wiki_biology 168.57 1310 80% 831 2
wiki_modern_life 153.72 1293 80% 959 2
wiki_arts 292.05 546 80% 437 2
wiki_society 134.26 1135 80% 1031 2
wiki_linguistics 92.01 1453 80% 1317 2
wiki_physical_science 93.78 1980 80% 1485 2
wiki_history 83.92 1985 80% 1620 2
early_modern_science 60.75 2128 80% 1743 2
religious_translated 52.03 1573 80% 1966 downrated 1
cooking 85.64 1470 80% 1076 2
legal_scotus 396.84 254 80% 289 downrated 2
eu_parliament_debates 42.50 2847 80% 1973 2
openstax_science 268.31 506 80% 508 downrated 2
openstax_society 134.26 1007 80% 1015 downrated 2
wpa_life_histories 198.62 519 80% 535 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.