Base Difficulty

Base difficulty: Level 1223 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: 478 (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 183.13 623 100% 527 2
20th_books 103.90 1081 100% 882 2
wiki_math 93.28 1648 100% 1067 2
wiki_geography 48.36 2829 100% 2829 1
wiki_biology 128.57 2091 100% 1060 2
wiki_modern_life 242.63 1068 100% 599 2
wiki_arts 1325.87 146 100% 75 3
wiki_society 221.04 943 100% 618 2
wiki_linguistics 1296.79 139 100% 92 2
wiki_physical_science 64.71 2201 100% 2201 1
wiki_history 314.94 601 100% 401 2
early_modern_science 342.69 470 100% 324 2
religious_translated 139.81 906 100% 719 2
cooking 0.00 — — — 0
legal_scotus 138.79 939 100% 939 1
eu_parliament_debates 20.92 3638 100% 3638 1
openstax_science 96.77 2579 100% 1311 2
openstax_society 75.58 2631 100% 1636 2
wpa_life_histories 60.17 1938 100% 1357 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.