Base Difficulty

Base difficulty: Level 4 edit

Level distribution for noun (shape): 4: 12 12: 2 370: 13 1080: 3 1120: 1 1399: 1

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: 1735 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Movers (2 of 3) 750
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 39.99 1519 49% 2091 downrated 2
20th_books 55.38 1070 49% 1601 downrated 2
wiki_math 708.76 126 49% 182 downrated 2
wiki_geography 64.73 1036 49% 2103 downrated 1
wiki_biology 16.58 3718 49% 7548 downrated 1
wiki_modern_life 115.42 839 49% 1193 downrated 2
wiki_arts 48.85 1396 49% 2834 downrated 1
wiki_society 12.39 5001 49% 10152 downrated 1
wiki_linguistics 32.87 1915 49% 3887 downrated 1
wiki_physical_science 87.27 815 49% 1654 downrated 1
wiki_history 25.48 2642 49% 5363 downrated 1
early_modern_science 54.78 1047 49% 2125 downrated 1
religious_translated 11.05 3730 49% 7572 downrated 1
cooking 233.97 748 97% 537 2
legal_scotus 5.48 6501 49% 13197 downrated 1
eu_parliament_debates 0.00 — — — 0
openstax_science 48.29 1405 49% 2852 downrated 1
openstax_society 12.41 4470 49% 9074 downrated 1
wpa_life_histories 43.95 1096 49% 2225 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.