Base Difficulty

Base difficulty: Level 310 edit

Level distribution for noun (human): 5: 9 19: 1 310: 45 330: 2 340: 1 370: 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 1399: 66

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: 1263 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
cambridge_yle Movers (2 of 3) 750
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 9.49 7388 67% 6149 2
20th_books 10.10 6531 67% 5736 2
wiki_math 54.51 2109 67% 1746 2
wiki_geography 105.07 1221 67% 1313 downrated 2
wiki_biology 0.00 — — — 0
wiki_modern_life 616.94 190 67% 159 3
wiki_arts 208.38 867 67% 637 3
wiki_society 15.36 5352 67% 8028 downrated 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 99.31 1738 67% 1379 2
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 10.66 6638 67% 5907 2
eu_parliament_debates 39.71 2208 67% 2244 downrated 2
openstax_science 13.84 4965 67% 7448 downrated 1
openstax_society 40.20 3522 67% 2920 2
wpa_life_histories 20.89 4039 67% 3279 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.