Base Difficulty

Base difficulty: Level 9 edit

Level distribution for noun (emotion_feeling): 9: 7 13: 4 100: 10 303: 16 390: 1 450: 1 1030: 1 1060: 1 1070: 1 1120: 1 1399: 11

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: 1431 (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 144.50 811 100% 642 2
20th_books 147.43 780 100% 652 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 177.28 767 100% 767 1
wiki_modern_life 28.65 4674 100% 4674 1
wiki_arts 25.53 4987 100% 4987 1
wiki_society 88.27 1608 100% 1608 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 35.23 3564 100% 3564 1
wiki_history 32.16 4055 100% 4055 1
early_modern_science 60.72 2815 100% 1676 2
religious_translated 274.21 459 100% 391 2
cooking 31.54 2357 100% 2357 1
legal_scotus 34.40 3586 100% 2566 2
eu_parliament_debates 0.00 — — — 0
openstax_science 220.96 628 100% 628 1
openstax_society 77.23 1786 100% 1786 1
wpa_life_histories 53.76 2066 100% 1490 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.