Base Difficulty

Base difficulty: Level 10 edit

Level distribution for noun (building_part): 10: 1 19: 1 24: 16 115: 3 120: 21 1000: 2 1010: 1 1040: 2 1070: 1 1078: 2 1090: 1 1120: 1 1201: 1 1399: 6

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: 487 (weighted harmonic mean of corpus + tier signals; lower = more common)
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 798.96 171 100% 151 2
20th_books 1124.68 127 100% 110 2
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 236.80 829 100% 589 2
wiki_arts 213.75 923 100% 628 2
wiki_society 45.45 3067 100% 3067 1
wiki_linguistics 25.80 3836 100% 3836 1
wiki_physical_science 112.95 1297 100% 1297 1
wiki_history 67.38 2040 100% 2040 1
early_modern_science 326.91 399 100% 334 2
religious_translated 45.87 2101 100% 2101 1
cooking 102.54 1127 100% 1127 1
legal_scotus 44.12 3000 100% 2206 2
eu_parliament_debates 45.90 2192 100% 2192 1
openstax_science 84.37 1640 100% 1640 1
openstax_society 88.05 2054 100% 1467 2
wpa_life_histories 692.40 211 100% 168 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.