Base Difficulty

Base difficulty: Level 260 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: 3680 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Flyers (3 of 3) 1200
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 18.60 1323 27% 4961 downrated 1
20th_books 16.21 1522 27% 5708 downrated 1
wiki_math 11.67 2234 27% 8000 capped 1
wiki_geography 8.47 4187 27% 9000 capped 1
wiki_biology 13.56 2663 27% 9000 capped 1
wiki_modern_life 16.82 2327 27% 8726 downrated 1
wiki_arts 13.79 2682 27% 10000 capped 1
wiki_society 18.62 2008 27% 7530 downrated 1
wiki_linguistics 6.69 3917 27% 9000 capped 1
wiki_physical_science 11.93 2968 27% 8000 capped 1
wiki_history 12.96 2803 27% 9000 capped 1
early_modern_science 16.29 1865 27% 6994 downrated 1
religious_translated 18.67 1471 27% 5516 downrated 1
cooking 0.00 — — — 0
legal_scotus 98.84 420 27% 1267 downrated 2
eu_parliament_debates 7.42 3090 27% 11000 capped 1
openstax_science 21.04 1747 27% 6551 downrated 1
openstax_society 19.93 1854 27% 6953 downrated 1
wpa_life_histories 7.56 2780 27% 10425 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.