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: 1993 (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 29.75 5050 100% 2402 3
20th_books 7.95 8273 100% 6955 2
wiki_math 0.00 — — — 0
wiki_geography 44.04 3106 100% 3106 1
wiki_biology 103.55 2169 100% 1303 2
wiki_modern_life 64.19 4285 100% 2148 2
wiki_arts 28.41 4585 100% 4585 1
wiki_society 78.98 3448 100% 1723 3
wiki_linguistics 242.91 1168 100% 506 4
wiki_physical_science 36.15 3508 100% 3508 1
wiki_history 101.31 2211 100% 1323 3
early_modern_science 120.74 2082 100% 891 3
religious_translated 17.61 4432 100% 4432 1
cooking 84.51 1776 100% 988 2
legal_scotus 135.96 2251 100% 783 5
eu_parliament_debates 51.12 2554 100% 1588 3
openstax_science 48.21 4409 100% 2234 2
openstax_society 46.30 4745 100% 2373 2
wpa_life_histories 8.51 7383 100% 7383 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.