Base Difficulty

Base difficulty: Level 22 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: 736 (weighted harmonic mean of corpus + tier signals; lower = more common)
Tier Signals
Source Tier Rank used
basic_english Basic (1 of 2) 600
cambridge_yle Starters (1 of 3) 325
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 481.10 242 100% 226 3
20th_books 531.47 236 100% 220 3
wiki_math 0.00 — — — 0
wiki_geography 30.12 4356 100% 4356 1
wiki_biology 31.16 3926 100% 3926 1
wiki_modern_life 0.00 — — — 0
wiki_arts 51.39 2695 100% 2695 1
wiki_society 38.86 3525 100% 3525 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 49.44 2768 100% 2768 1
early_modern_science 175.71 625 100% 625 1
religious_translated 156.63 770 100% 663 2
cooking 214.04 616 100% 616 1
legal_scotus 10.12 6851 100% 6851 1
eu_parliament_debates 17.20 4106 100% 4106 1
openstax_science 18.27 5362 100% 5362 1
openstax_society 40.06 3099 100% 3099 1
wpa_life_histories 405.16 298 100% 283 2

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.