Base Difficulty

Base difficulty: Level 320 edit

Level distribution for adjective (quality): 3: 1 11: 10 14: 12 17: 23 18: 3 20: 4 318: 35 320: 28 330: 1 340: 2 360: 2 380: 1 400: 3 420: 4 430: 27 469: 27 470: 2 1040: 2 1060: 2 1070: 13 1090: 3 1110: 2 1120: 47 1214: 1 1399: 16

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: 537 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Flyers (3 of 3) 1200
cefr A2 (2 of 6) 2100

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 13.71 5212 100% 5212 1
20th_books 34.07 2455 100% 2455 1
wiki_math 85.22 1398 100% 1398 1
wiki_geography 498.05 216 100% 216 1
wiki_biology 368.16 310 100% 310 1
wiki_modern_life 632.33 147 100% 147 1
wiki_arts 896.79 100 100% 100 1
wiki_society 319.69 352 100% 352 1
wiki_linguistics 215.15 618 100% 618 1
wiki_physical_science 103.94 1410 100% 1410 1
wiki_history 320.49 352 100% 352 1
early_modern_science 58.82 1946 100% 1946 1
religious_translated 23.79 3576 100% 3576 1
cooking 40.56 2025 100% 2025 1
legal_scotus 22.05 4267 100% 4267 1
eu_parliament_debates 27.61 3106 100% 3106 1
openstax_science 49.42 2589 100% 2589 1
openstax_society 248.63 549 100% 549 1
wpa_life_histories 60.17 1559 100% 1559 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.