Base Difficulty

Base difficulty: Level 29 edit

Level distribution for noun (activity): 20: 1 29: 14 260: 16 264: 28 266: 29 278: 1 330: 2 360: 1 380: 1 405: 2 406: 1 410: 1 416: 1 1000: 8 1010: 3 1020: 2 1030: 1 1040: 11 1050: 2 1060: 6 1070: 5 1078: 2 1090: 1 1120: 5 1205: 1 1208: 2 1211: 1 1212: 1 1214: 3 1215: 2 1216: 1 1217: 2 1218: 1 1219: 1 1220: 1 1221: 3 1222: 3 1223: 1 1224: 3 1225: 9 1226: 1 1399: 74

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: 379 (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 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 92.29 1020 100% 1020 1
20th_books 143.44 704 100% 704 1
wiki_math 43.76 2225 100% 2225 1
wiki_geography 299.09 408 100% 408 1
wiki_biology 0.00 — — — 0
wiki_modern_life 89.14 1653 100% 1653 1
wiki_arts 2628.51 37 100% 37 1
wiki_society 143.49 938 100% 938 1
wiki_linguistics 71.54 1786 100% 1786 1
wiki_physical_science 0.00 — — — 0
wiki_history 500.26 189 100% 189 1
early_modern_science 49.72 2235 100% 2235 1
religious_translated 100.94 1020 100% 1020 1
cooking 98.01 1164 100% 1164 1
legal_scotus 10.52 6698 100% 6698 1
eu_parliament_debates 0.00 — — — 0
openstax_science 21.60 4838 100% 4838 1
openstax_society 129.68 1098 100% 1098 1
wpa_life_histories 148.47 703 100% 703 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.