Base difficulty: Level 1050 edit
Level distribution for noun (chemical_compound): -1: 1 314: 17 1010: 1 1040: 1 1050: 32 1070: 1 1100: 103
No difficulty overrides set. The base difficulty level will be used for all languages.
Add Difficulty Override
python -m storage.admin --calc-ranks to populate)
Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Extended (2 of 2) | 1600 |
cefr |
B1 (3 of 6) | 4200 |
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 |
5.21 | 9549 | 100% | 9549 | 1 |
20th_books |
0.00 | — | — | — | 0 |
wiki_math |
36.06 | 2447 | 100% | 2447 | 1 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
147.73 | 916 | 100% | 916 | 1 |
wiki_modern_life |
75.16 | 1948 | 100% | 1948 | 1 |
wiki_arts |
24.15 | 4797 | 100% | 4797 | 1 |
wiki_society |
0.00 | — | — | — | 0 |
wiki_linguistics |
190.31 | 664 | 100% | 664 | 1 |
wiki_physical_science |
219.60 | 648 | 100% | 648 | 1 |
wiki_history |
0.00 | — | — | — | 0 |
early_modern_science |
124.67 | 895 | 100% | 895 | 1 |
religious_translated |
16.15 | 4530 | 100% | 4530 | 1 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
7.29 | 7655 | 100% | 7655 | 1 |
eu_parliament_debates |
0.00 | — | — | — | 0 |
openstax_science |
208.65 | 679 | 100% | 679 | 1 |
openstax_society |
0.00 | — | — | — | 0 |
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.