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: 1131 (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 13.98 5126 100% 5126 1
20th_books 8.41 7034 100% 7034 1
wiki_math 0.00 — — — 0
wiki_geography 431.88 249 100% 249 1
wiki_biology 53.40 2535 100% 2535 1
wiki_modern_life 125.16 1162 100% 1162 1
wiki_arts 168.49 767 100% 767 1
wiki_society 155.45 850 100% 850 1
wiki_linguistics 45.68 2565 100% 2565 1
wiki_physical_science 107.68 1363 100% 1363 1
wiki_history 444.25 228 100% 228 1
early_modern_science 47.46 2322 100% 2322 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 47.76 2427 100% 2427 1
eu_parliament_debates 113.04 1062 100% 1062 1
openstax_science 0.00 — — — 0
openstax_society 73.99 1868 100% 1868 1
wpa_life_histories 69.02 1404 100% 1404 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.