Base Difficulty

Base difficulty: Level 1220 edit

Level distribution for verb (rule_defined_action): 415: 1 475: 5 485: 2 1200: 1 1202: 3 1203: 1 1204: 2 1205: 3 1206: 3 1208: 3 1211: 1 1214: 5 1220: 4 1224: 1 1226: 3 1399: 7

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: 10108 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Movers (2 of 3) 750
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 4.65 270 1% 20000 capped 4
20th_books 5.18 256 1% 20000 capped 4
wiki_math 15.45 43 1% 6915 downrated 3
wiki_geography 5.06 125 1% 9000 capped 2
wiki_biology 10.46 61 1% 9000 capped 4
wiki_modern_life 8.70 61 1% 9708 downrated 3
wiki_arts 7.21 87 1% 10000 capped 4
wiki_society 6.78 93 1% 11000 capped 4
wiki_linguistics 7.39 104 1% 9000 capped 4
wiki_physical_science 9.00 60 1% 8000 capped 1
wiki_history 5.87 119 1% 9000 capped 4
early_modern_science 5.45 182 1% 10400 capped 4
religious_translated 8.55 139 1% 10400 capped 4
cooking 1.84 591 1% 5200 capped 3
legal_scotus 1.83 1129 1% 20000 capped 4
eu_parliament_debates 4.16 382 1% 11000 capped 4
openstax_science 13.02 49 1% 7559 downrated 4
openstax_society 5.81 150 1% 11000 capped 4
wpa_life_histories 6.21 211 1% 18577 downrated 4

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.