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: 2742 (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 5.09 3990 20% 13986 downrated 2
20th_books 2.40 5559 20% 20000 capped 1
wiki_math 79.00 493 20% 1709 downrated 2
wiki_geography 37.74 875 20% 3560 downrated 2
wiki_biology 175.84 209 20% 618 downrated 2
wiki_modern_life 85.85 311 20% 1318 downrated 2
wiki_arts 55.64 478 20% 2157 downrated 2
wiki_society 36.08 722 20% 3610 downrated 1
wiki_linguistics 246.23 158 20% 494 downrated 2
wiki_physical_science 45.03 624 20% 3120 downrated 1
wiki_history 17.83 1506 20% 7530 downrated 1
early_modern_science 69.98 594 20% 1564 downrated 2
religious_translated 3.40 4554 20% 10400 capped 1
cooking 51.60 729 20% 2352 downrated 2
legal_scotus 16.67 1663 20% 7062 downrated 2
eu_parliament_debates 5.20 3205 20% 11000 capped 1
openstax_science 49.84 554 20% 2770 downrated 1
openstax_society 45.51 614 20% 3070 downrated 1
wpa_life_histories 5.22 2960 20% 14800 downrated 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.