Base Difficulty

Base difficulty: Level 1000 edit

Level distribution for noun (collection_things): 278: 1 405: 1 450: 1 460: 9 1000: 5 1010: 1 1030: 1 1050: 3 1060: 1 1078: 2 1080: 1 1120: 1 1205: 3 1211: 1 1214: 1 1220: 3 1223: 2 1399: 33

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: 1302 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
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 8.86 6043 80% 7554 downrated 1
20th_books 13.97 4232 80% 5290 downrated 1
wiki_math 257.77 483 80% 496 downrated 2
wiki_geography 128.32 1138 80% 1071 2
wiki_biology 49.07 2230 80% 2787 downrated 1
wiki_modern_life 72.82 1614 80% 2018 downrated 1
wiki_arts 402.26 278 80% 276 2
wiki_society 134.83 1130 80% 1026 2
wiki_linguistics 65.78 2095 80% 1742 2
wiki_physical_science 52.21 2180 80% 2725 downrated 1
wiki_history 191.09 643 80% 668 downrated 2
early_modern_science 51.03 2846 80% 2002 2
religious_translated 31.74 2350 80% 2938 downrated 1
cooking 0.00 — — — 0
legal_scotus 43.88 2410 80% 2351 2
eu_parliament_debates 23.37 2972 80% 3715 downrated 1
openstax_science 77.47 1419 80% 1774 downrated 1
openstax_society 84.33 1960 80% 1555 2
wpa_life_histories 48.22 1740 80% 1846 downrated 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.