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: 1186 (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 4268 100% 4268 1
20th_books 20.19 3781 100% 3781 1
wiki_math 0.00 — — — 0
wiki_geography 360.23 327 100% 327 1
wiki_biology 53.04 2552 100% 2552 1
wiki_modern_life 127.74 1131 100% 1131 1
wiki_arts 156.60 837 100% 837 1
wiki_society 142.90 945 100% 945 1
wiki_linguistics 37.08 2967 100% 2967 1
wiki_physical_science 77.06 1866 100% 1866 1
wiki_history 450.12 221 100% 221 1
early_modern_science 67.96 1684 100% 1684 1
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 48.57 2389 100% 2389 1
eu_parliament_debates 94.34 1256 100% 1256 1
openstax_science 0.00 — — — 0
openstax_society 71.10 1931 100% 1931 1
wpa_life_histories 52.88 1799 100% 1799 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.