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: 349 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600

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 74.89 1234 100% 1234 1
20th_books 98.43 1004 100% 1004 1
wiki_math 71.40 1582 100% 1582 1
wiki_geography 238.20 528 100% 528 1
wiki_biology 233.50 552 100% 552 1
wiki_modern_life 314.03 354 100% 354 1
wiki_arts 370.83 287 100% 287 1
wiki_society 1573.63 53 100% 53 1
wiki_linguistics 368.38 338 100% 338 1
wiki_physical_science 97.45 1492 100% 1492 1
wiki_history 417.59 244 100% 244 1
early_modern_science 24.67 3919 100% 3919 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 92.87 1422 100% 1422 1
eu_parliament_debates 831.49 139 100% 139 1
openstax_science 95.53 1440 100% 1440 1
openstax_society 1562.80 62 100% 62 1
wpa_life_histories 75.27 1259 100% 1259 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.