Base Difficulty

Base difficulty: Level 260 edit

Level distribution for noun (activity): 20: 1 29: 14 260: 16 264: 28 266: 29 278: 1 330: 2 360: 1 380: 1 405: 2 406: 1 410: 1 416: 1 1000: 8 1010: 3 1020: 2 1030: 1 1040: 11 1050: 2 1060: 6 1070: 5 1078: 2 1090: 1 1120: 5 1205: 1 1208: 2 1211: 1 1212: 1 1214: 3 1215: 2 1216: 1 1217: 2 1218: 1 1219: 1 1220: 1 1221: 3 1222: 3 1223: 1 1224: 3 1225: 9 1226: 1 1399: 74

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: 1774 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cefr A2 (2 of 6) 2100

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 19.80 1151 17% 3909 downrated 2
20th_books 19.14 867 17% 5202 downrated 1
wiki_math 36.66 1223 17% 2466 downrated 2
wiki_geography 7.08 3215 17% 9000 capped 1
wiki_biology 0.00 — — — 0
wiki_modern_life 16.07 1532 17% 9192 downrated 1
wiki_arts 148.59 249 17% 804 downrated 2
wiki_society 125.96 985 17% 1112 downrated 2
wiki_linguistics 270.32 89 17% 413 downrated 2
wiki_physical_science 5.12 3942 17% 8000 capped 1
wiki_history 229.34 299 17% 535 downrated 2
early_modern_science 63.44 2007 100% 1791 2
religious_translated 30.20 2150 17% 2868 downrated 2
cooking 0.00 — — — 0
legal_scotus 14.16 2569 17% 5540 downrated 2
eu_parliament_debates 8.80 1993 17% 11000 capped 1
openstax_science 7.75 2726 17% 11000 capped 1
openstax_society 55.48 1120 17% 2314 downrated 2
wpa_life_histories 8.39 1798 17% 10788 downrated 1

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.