Base Difficulty

Base difficulty: Level 1399 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: 885 (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 30.96 1684 57% 2947 downrated 1
20th_books 2.88 9971 57% 17449 downrated 1
wiki_math 13.82 3237 57% 5665 downrated 1
wiki_geography 169.51 413 57% 723 downrated 1
wiki_biology 288.96 207 57% 362 downrated 1
wiki_modern_life 354.25 151 57% 264 downrated 1
wiki_arts 406.22 170 57% 257 downrated 2
wiki_society 174.34 372 57% 651 downrated 1
wiki_linguistics 66.81 1111 57% 1944 downrated 1
wiki_physical_science 308.69 208 57% 364 downrated 1
wiki_history 135.74 493 57% 863 downrated 1
early_modern_science 104.53 1096 57% 1117 downrated 2
religious_translated 12.27 3848 57% 6734 downrated 1
cooking 17.38 2398 57% 4197 downrated 1
legal_scotus 38.38 1994 57% 2876 downrated 2
eu_parliament_debates 145.62 483 57% 845 downrated 1
openstax_science 194.85 369 57% 646 downrated 1
openstax_society 282.26 235 57% 411 downrated 1
wpa_life_histories 10.85 3763 57% 6585 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.