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: 1383 (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 11.60 5826 100% 5826 1
20th_books 9.89 6283 100% 6283 1
wiki_math 0.00 — — — 0
wiki_geography 318.32 373 100% 373 1
wiki_biology 49.07 2744 100% 2744 1
wiki_modern_life 115.93 1262 100% 1262 1
wiki_arts 146.02 910 100% 910 1
wiki_society 100.10 1406 100% 1406 1
wiki_linguistics 30.63 3398 100% 3398 1
wiki_physical_science 81.33 1781 100% 1781 1
wiki_history 372.53 280 100% 280 1
early_modern_science 36.45 2896 100% 2896 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 38.45 2910 100% 2910 1
eu_parliament_debates 62.58 1740 100% 1740 1
openstax_science 0.00 — — — 0
openstax_society 48.78 2664 100% 2664 1
wpa_life_histories 47.28 1966 100% 1966 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.