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

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 Flyers (3 of 3) 1200

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 109.15 855 100% 855 1
20th_books 127.78 764 100% 764 1
wiki_math 0.00 — — — 0
wiki_geography 98.46 1335 100% 1335 1
wiki_biology 221.24 574 100% 574 1
wiki_modern_life 155.96 868 100% 868 1
wiki_arts 42.52 3003 100% 3003 1
wiki_society 41.17 3225 100% 3225 1
wiki_linguistics 0.00 — — — 0
wiki_physical_science 0.00 — — — 0
wiki_history 76.89 1693 100% 1693 1
early_modern_science 123.90 899 100% 899 1
religious_translated 106.73 959 100% 959 1
cooking 79.31 1339 100% 1339 1
legal_scotus 5.83 8727 100% 8727 1
eu_parliament_debates 27.40 2996 100% 2996 1
openstax_science 62.22 2138 100% 2138 1
openstax_society 25.96 4365 100% 4365 1
wpa_life_histories 192.97 553 100% 553 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.