Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (concept_idea): 19: 2 26: 1 27: 1 221: 28 270: 30 274: 30 275: 28 280: 25 300: 1 360: 1 380: 2 1000: 1 1030: 1 1060: 5 1070: 6 1110: 4 1120: 4 1399: 66

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: 3522 (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 17.33 706 9% 5359 downrated 2
20th_books 9.18 1315 9% 9647 downrated 2
wiki_math 127.88 214 14% 1015 downrated 3
wiki_geography 5.40 3601 14% 9000 capped 1
wiki_biology 16.03 1621 14% 8630 downrated 2
wiki_modern_life 48.68 528 9% 2614 downrated 2
wiki_arts 47.25 494 14% 2614 downrated 2
wiki_society 42.08 663 14% 3072 downrated 2
wiki_linguistics 81.37 194 9% 1499 downrated 2
wiki_physical_science 128.69 212 9% 888 downrated 3
wiki_history 16.34 1713 14% 8351 downrated 2
early_modern_science 42.79 463 9% 2572 downrated 2
religious_translated 27.03 738 9% 3913 downrated 2
cooking 0.00 — — — 0
legal_scotus 12.86 1297 9% 9355 downrated 2
eu_parliament_debates 3.53 3912 9% 11000 capped 2
openstax_science 101.83 229 9% 1133 downrated 3
openstax_society 24.57 1104 14% 5747 downrated 2
wpa_life_histories 3.02 3239 9% 20000 capped 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.