Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for verb (creation_action): 7: 1 10: 1 205: 1 260: 1 295: 1 330: 3 380: 1 400: 1 415: 1 455: 1 470: 12 475: 7 485: 1 1000: 1 1010: 1 1040: 1 1070: 1 1110: 2 1120: 1 1399: 31

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: 1331 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cefr B1 (3 of 6) 4200

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 17.70 1272 17% 4843 downrated 3
20th_books 16.27 1404 17% 5302 downrated 3
wiki_math 253.50 187 17% 521 downrated 3
wiki_geography 126.91 383 17% 1014 downrated 4
wiki_biology 135.89 361 17% 947 downrated 4
wiki_modern_life 150.95 305 17% 791 downrated 4
wiki_arts 72.87 670 17% 1841 downrated 4
wiki_society 132.70 289 17% 911 downrated 4
wiki_linguistics 113.40 397 17% 1136 downrated 4
wiki_physical_science 256.55 175 17% 466 downrated 4
wiki_history 115.98 391 17% 1065 downrated 4
early_modern_science 99.10 359 17% 1095 downrated 3
religious_translated 13.61 2035 17% 6954 downrated 2
cooking 37.56 873 17% 3107 downrated 2
legal_scotus 118.19 269 17% 1010 downrated 4
eu_parliament_debates 124.23 298 17% 944 downrated 4
openstax_science 266.04 155 17% 406 downrated 4
openstax_society 157.93 214 17% 782 downrated 4
wpa_life_histories 11.59 2249 17% 6971 downrated 3

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.