Base Difficulty

Base difficulty: Level 480 edit

Level distribution for verb (communication): 10: 2 11: 1 29: 1 119: 2 140: 1 185: 1 196: 1 215: 1 230: 1 295: 2 300: 1 310: 3 329: 1 400: 1 415: 4 455: 2 460: 2 475: 4 480: 52 485: 5 1000: 2 1060: 1 1070: 2 1120: 2 1399: 73

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: 1628 (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 99.06 1528 80% 909 3
20th_books 72.10 1342 40% 1164 4
wiki_math 21.71 3744 80% 3161 2
wiki_geography 12.56 4237 40% 9000 capped 1
wiki_biology 0.00 — — — 0
wiki_modern_life 40.36 2017 40% 3561 downrated 2
wiki_arts 37.66 3906 40% 3487 2
wiki_society 109.01 1718 40% 1243 4
wiki_linguistics 94.37 1779 40% 1246 3
wiki_physical_science 0.00 — — — 0
wiki_history 56.80 2782 40% 2395 2
early_modern_science 26.43 3431 40% 3531 downrated 2
religious_translated 150.75 728 80% 686 3
cooking 0.00 — — — 0
legal_scotus 279.62 524 40% 453 4
eu_parliament_debates 185.67 812 40% 604 4
openstax_science 21.78 2368 40% 5920 downrated 1
openstax_society 124.18 943 40% 1037 downrated 4
wpa_life_histories 63.19 739 40% 1541 downrated 2

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.