Base Difficulty

Base difficulty: Level 18 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: 1652 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 153.36 340 50% 680 downrated 1
20th_books 135.35 383 50% 766 downrated 1
wiki_math 9.24 3801 50% 7602 downrated 1
wiki_geography 82.91 801 50% 1602 downrated 1
wiki_biology 80.28 841 50% 1682 downrated 1
wiki_modern_life 54.32 1366 50% 2732 downrated 1
wiki_arts 90.19 712 50% 1424 downrated 1
wiki_society 59.16 1164 50% 2328 downrated 1
wiki_linguistics 106.95 619 50% 1238 downrated 1
wiki_physical_science 50.70 1440 50% 2880 downrated 1
wiki_history 167.35 332 50% 664 downrated 1
early_modern_science 73.09 767 50% 1534 downrated 1
religious_translated 98.52 552 50% 1104 downrated 1
cooking 14.65 2449 50% 4898 downrated 1
legal_scotus 28.54 2100 50% 4200 downrated 1
eu_parliament_debates 43.03 1344 50% 2688 downrated 1
openstax_science 57.14 1232 50% 2464 downrated 1
openstax_society 78.95 900 50% 1800 downrated 1
wpa_life_histories 138.37 399 50% 798 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.