Base Difficulty

Base difficulty: Level 5 edit

Level distribution for noun (human): 5: 9 19: 1 310: 46 330: 2 340: 1 370: 1 380: 1 390: 1 400: 2 405: 1 1000: 4 1010: 1 1020: 3 1030: 2 1040: 5 1050: 1 1060: 8 1070: 8 1120: 7 1130: 5

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 153.37 335 50% 670 downrated 1
20th_books 209.29 272 50% 544 downrated 1
wiki_math 11.05 3300 50% 6600 downrated 1
wiki_geography 93.62 659 50% 1318 downrated 1
wiki_biology 46.17 1501 50% 3002 downrated 1
wiki_modern_life 212.71 230 50% 460 downrated 1
wiki_arts 134.03 406 50% 812 downrated 1
wiki_society 235.16 209 50% 418 downrated 1
wiki_linguistics 256.56 235 50% 470 downrated 1
wiki_physical_science 20.80 3051 50% 6102 downrated 1
wiki_history 208.93 223 50% 446 downrated 1
early_modern_science 60.23 937 50% 1874 downrated 1
religious_translated 377.58 166 50% 332 downrated 1
cooking 44.75 1228 50% 2456 downrated 1
legal_scotus 119.81 529 50% 1058 downrated 1
eu_parliament_debates 138.08 454 50% 908 downrated 1
openstax_science 48.74 1407 50% 2814 downrated 1
openstax_society 560.85 90 50% 180 downrated 1
wpa_life_histories 468.95 144 50% 288 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.