Base Difficulty

Base difficulty: Level 170 edit

Level distribution for noun (animal_grouping_term): -1: 5 170: 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, 1-1299 for level
Frequency and Tier Signals
Combined Frequency Rank: — (run python -m storage.admin --calc-ranks to populate)
Tier Signals
Source Tier Rank used
cefr A2 (2 of 6) 2100

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 4.60 9095 80% 11369 downrated 1
20th_books 5.13 8182 80% 10228 downrated 1
wiki_math 13.96 3881 80% 4851 downrated 1
wiki_geography 0.00 — — — 0
wiki_biology 23.17 4139 80% 5174 downrated 1
wiki_modern_life 124.77 869 80% 1086 downrated 1
wiki_arts 47.90 2215 80% 2769 downrated 1
wiki_society 31.48 3361 80% 4201 downrated 1
wiki_linguistics 25.15 3160 80% 3950 downrated 1
wiki_physical_science 0.00 — — — 0
wiki_history 0.00 — — — 0
early_modern_science 0.00 — — — 0
religious_translated 0.00 — — — 0
cooking 0.00 — — — 0
legal_scotus 0.00 — — — 0
eu_parliament_debates 0.00 — — — 0
openstax_science 48.78 2174 80% 2718 downrated 1
openstax_society 20.11 4474 80% 5592 downrated 1
wpa_life_histories 0.00 — — — 0

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.