Base Difficulty

Base difficulty: Level 133 edit

Level distribution for noun (disease_condition): 133: 8 380: 1 400: 1 410: 1 450: 15 1010: 1 1050: 1 1070: 3 1120: 1 1399: 5

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: 881 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
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 29.01 3496 100% 2540 2
20th_books 19.14 3956 100% 3956 1
wiki_math 32.34 2695 100% 2695 1
wiki_geography 88.91 3055 100% 1537 2
wiki_biology 645.48 274 100% 181 2
wiki_modern_life 156.08 1537 100% 942 2
wiki_arts 0.00 — — — 0
wiki_society 103.63 2243 100% 1339 2
wiki_linguistics 0.00 — — — 0
wiki_physical_science 196.29 1175 100% 739 2
wiki_history 86.50 1560 100% 1560 1
early_modern_science 252.49 578 100% 435 2
religious_translated 61.17 2086 100% 1464 2
cooking 0.00 — — — 0
legal_scotus 44.32 2947 100% 2202 2
eu_parliament_debates 138.96 1504 100% 802 2
openstax_science 934.27 148 100% 116 2
openstax_society 247.61 781 100% 571 2
wpa_life_histories 28.91 3630 100% 2524 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.