Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for verb (change): 22: 4 28: 1 109: 1 140: 1 162: 2 194: 1 254: 1 255: 1 309: 2 311: 1 321: 16 410: 2 415: 2 475: 5 1040: 1 1090: 1 1399: 38

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: 9263 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 8.02 2682 17% 10149 downrated 2
20th_books 8.06 2667 17% 9058 downrated 3
wiki_math 0.00 — — — 0
wiki_geography 12.29 1910 17% 9000 capped 1
wiki_biology 5.37 3817 17% 9000 capped 1
wiki_modern_life 5.70 4040 17% 10000 capped 1
wiki_arts 9.82 2337 17% 10000 capped 1
wiki_society 5.74 3930 17% 11000 capped 1
wiki_linguistics 6.41 2897 17% 9000 capped 1
wiki_physical_science 0.00 — — — 0
wiki_history 21.03 1413 17% 6285 downrated 2
early_modern_science 3.23 4629 17% 10400 capped 1
religious_translated 7.83 3293 17% 10400 capped 2
cooking 0.00 — — — 0
legal_scotus 9.34 3312 17% 9616 downrated 3
eu_parliament_debates 6.35 3796 17% 11000 capped 2
openstax_science 0.00 — — — 0
openstax_society 9.36 3644 17% 11000 capped 2
wpa_life_histories 3.32 3615 17% 20000 capped 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.