Base Difficulty

Base difficulty: Level 20 edit

Level distribution for adjective (physical_property): 3: 1 8: 2 11: 11 14: 20 17: 9 18: 7 20: 2 27: 3 133: 1 179: 1 249: 1 330: 1 340: 1 355: 38 360: 1 370: 2 379: 1 380: 1 420: 1 1000: 1 1010: 3 1040: 8 1050: 5 1090: 2 1120: 16 1209: 1 1399: 9

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: 1557 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Starters (1 of 3) 325
cefr A1 (1 of 6) 800

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 66.20 720 50% 1440 downrated 1
20th_books 75.51 667 50% 1334 downrated 1
wiki_math 255.81 264 50% 528 downrated 1
wiki_geography 53.57 1280 50% 2560 downrated 1
wiki_biology 33.01 2066 50% 4132 downrated 1
wiki_modern_life 67.31 1062 50% 2124 downrated 1
wiki_arts 51.54 1331 50% 2662 downrated 1
wiki_society 32.81 2111 50% 4222 downrated 1
wiki_linguistics 62.07 1040 50% 2080 downrated 1
wiki_physical_science 59.87 1229 50% 2458 downrated 1
wiki_history 30.14 2262 50% 4524 downrated 1
early_modern_science 26.39 2108 50% 4216 downrated 1
religious_translated 13.94 3126 50% 6252 downrated 1
cooking 17.47 2200 50% 4400 downrated 1
legal_scotus 15.99 3299 50% 6598 downrated 1
eu_parliament_debates 25.07 2051 50% 4102 downrated 1
openstax_science 45.72 1513 50% 3026 downrated 1
openstax_society 22.53 2835 50% 5670 downrated 1
wpa_life_histories 35.40 1365 50% 2730 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.