Base Difficulty

Base difficulty: Level 21 edit

Level distribution for noun (temporal_name): 21: 19 215: 4

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: 1230 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Extended (2 of 2) 1600
cambridge_yle Flyers (3 of 3) 1200
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 17.80 4267 100% 4267 1
20th_books 11.36 5708 100% 5708 1
wiki_math 19.63 3597 100% 3597 1
wiki_geography 351.36 334 100% 334 1
wiki_biology 42.58 3106 100% 3106 1
wiki_modern_life 109.92 1341 100% 1341 1
wiki_arts 167.17 774 100% 774 1
wiki_society 110.71 1266 100% 1266 1
wiki_linguistics 32.25 3292 100% 3292 1
wiki_physical_science 65.01 2186 100% 2186 1
wiki_history 447.00 224 100% 224 1
early_modern_science 71.76 1605 100% 1605 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 45.94 2505 100% 2505 1
eu_parliament_debates 93.28 1269 100% 1269 1
openstax_science 0.00 — — — 0
openstax_society 69.03 1988 100% 1988 1
wpa_life_histories 47.28 1967 100% 1967 1

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.