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 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 858.07 195 100% 133 2
20th_books 1214.94 129 100% 102 2
wiki_math 203.57 948 100% 598 2
wiki_geography 1619.56 56 100% 54 2
wiki_biology 497.51 264 100% 229 2
wiki_modern_life 1140.46 104 100% 82 2
wiki_arts 932.07 148 100% 109 2
wiki_society 2526.05 48 100% 35 2
wiki_linguistics 2083.34 84 100% 53 2
wiki_physical_science 340.12 512 100% 410 2
wiki_history 1644.04 63 100% 57 2
early_modern_science 450.74 367 100% 240 2
religious_translated 1669.82 89 100% 73 2
cooking 222.07 862 100% 523 2
legal_scotus 865.87 154 100% 122 2
eu_parliament_debates 1550.84 78 100% 74 2
openstax_science 649.17 306 100% 197 2
openstax_society 4308.35 27 100% 23 2
wpa_life_histories 1602.55 101 100% 86 2

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.