Base Difficulty

Base difficulty: Level 1399 edit

Level distribution for noun (time_period): 6: 4 22: 25 220: 15 405: 3 1030: 2 1050: 1 1070: 1 1120: 4 1200: 1 1202: 2 1399: 14

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: 10356 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals

No lemma-tier assignment found yet.

Corpus Frequency
Corpus Freq (per M) Best form Share Zipf rank Forms
19th_books 1.30 7706 17% 20000 capped 1
20th_books 1.68 6248 17% 20000 capped 1
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 5.20 4371 17% 10000 capped 1
wiki_arts 6.60 3414 17% 10000 capped 1
wiki_society 5.16 4290 17% 11000 capped 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 8.25 2736 17% 8000 capped 1
wiki_history 14.33 1571 17% 9000 capped 1
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 1.82 6556 17% 20000 capped 1
eu_parliament_debates 0.00 — — — 0
openstax_science 7.55 2792 17% 11000 capped 1
openstax_society 6.88 3030 17% 11000 capped 1
wpa_life_histories 2.02 5262 17% 20000 capped 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.