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: 1089 (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 63.69 1437 100% 1437 1
20th_books 18.30 4081 100% 4081 1
wiki_math 0.00 — — — 0
wiki_geography 391.29 286 100% 286 1
wiki_biology 66.75 2039 100% 2039 1
wiki_modern_life 123.23 1175 100% 1175 1
wiki_arts 192.61 669 100% 669 1
wiki_society 148.55 902 100% 902 1
wiki_linguistics 45.68 2568 100% 2568 1
wiki_physical_science 93.88 1551 100% 1551 1
wiki_history 471.93 206 100% 206 1
early_modern_science 47.08 2344 100% 2344 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 41.08 2763 100% 2763 1
eu_parliament_debates 100.93 1173 100% 1173 1
openstax_science 0.00 — — — 0
openstax_society 93.83 1472 100% 1472 1
wpa_life_histories 47.73 1947 100% 1947 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.