Base Difficulty

Base difficulty: Level 28 edit

Level distribution for noun (plant): 28: 5 165: 18 330: 1 1010: 6 1020: 1 1040: 1 1090: 7

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
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 377.94 481 100% 265 2
20th_books 477.56 393 100% 219 2
wiki_math 86.08 1927 100% 1107 2
wiki_geography 253.00 846 100% 511 2
wiki_biology 1292.66 152 100% 77 2
wiki_modern_life 156.83 1717 100% 928 2
wiki_arts 103.75 2226 100% 1260 2
wiki_society 112.93 1802 100% 1189 2
wiki_linguistics 183.58 957 100% 653 2
wiki_physical_science 207.25 1316 100% 699 2
wiki_history 73.72 2769 100% 1662 2
early_modern_science 612.62 278 100% 173 2
religious_translated 473.97 403 100% 224 2
cooking 31.72 2365 100% 2365 1
legal_scotus 12.08 7738 100% 4291 2
eu_parliament_debates 12.05 4689 100% 4689 1
openstax_science 255.11 977 100% 555 2
openstax_society 69.23 3222 100% 1735 2
wpa_life_histories 443.79 470 100% 246 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.