Base Difficulty

Base difficulty: Level 370 edit

Level distribution for noun (quality_attribute): 370: 12 405: 3 450: 1 456: 1 1000: 2 1030: 1 1040: 2 1050: 1 1070: 4 1120: 2 1399: 50

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: 1539 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
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 81.41 1438 99% 1077 2
20th_books 57.62 1910 99% 1425 2
wiki_math 51.58 3015 99% 1537 2
wiki_geography 36.05 3749 99% 3777 downrated 1
wiki_biology 60.52 2246 99% 2263 downrated 1
wiki_modern_life 271.05 666 99% 496 2
wiki_arts 31.81 4110 99% 4141 downrated 1
wiki_society 60.91 2257 99% 2274 downrated 1
wiki_linguistics 27.20 3650 99% 3677 downrated 1
wiki_physical_science 73.99 1934 99% 1949 downrated 1
wiki_history 72.41 1867 99% 1881 downrated 1
early_modern_science 120.97 1219 99% 926 2
religious_translated 38.42 2409 99% 2427 downrated 1
cooking 62.63 1529 99% 1540 downrated 1
legal_scotus 81.15 2042 99% 1385 2
eu_parliament_debates 118.42 1487 99% 915 2
openstax_science 104.78 1747 99% 1232 2
openstax_society 240.43 753 99% 582 2
wpa_life_histories 41.15 3114 99% 1911 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.