Base Difficulty

Base difficulty: Level 205 edit

Level distribution for verb (perception): 3: 1 8: 2 185: 1 205: 1 214: 12 230: 1 265: 1 279: 1 455: 1 1040: 1

Per-Language Difficulty Overrides

No difficulty overrides set. The base difficulty level will be used for all languages.

Add Difficulty Override
-1 to exclude, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
cambridge_yle Starters (1 of 3) 325

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 333.45 641 80% 279 4
20th_books 410.98 597 100% 240 4
wiki_math 0.00 — — — 0
wiki_geography 0.00 — — — 0
wiki_biology 0.00 — — — 0
wiki_modern_life 60.30 3174 80% 2308 2
wiki_arts 77.49 3339 80% 1546 3
wiki_society 0.00 — — — 0
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 0.00 — — — 0
early_modern_science 130.58 1633 80% 810 3
religious_translated 95.34 1292 80% 943 3
cooking 0.00 — — — 0
legal_scotus 5.50 8012 80% 10015 downrated 1
eu_parliament_debates 23.71 4210 80% 2488 2
openstax_science 15.26 5242 80% 6552 downrated 1
openstax_society 103.43 2654 80% 1190 3
wpa_life_histories 268.93 576 80% 367 4

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.