Base difficulty: Level 1399 edit
Level distribution for noun (mathematical_concept): 276: 1 280: 1 329: 3 380: 4 1080: 15 1399: 19
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Extended (2 of 2) | 1600 |
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 |
0.00 | — | — | — | 0 |
20th_books |
0.00 | — | — | — | 0 |
wiki_math |
121.38 | 464 | 20% | 988 downrated | 2 |
wiki_geography |
18.82 | 1507 | 20% | 7535 downrated | 1 |
wiki_biology |
46.41 | 556 | 20% | 2780 downrated | 1 |
wiki_modern_life |
63.92 | 341 | 20% | 1705 downrated | 1 |
wiki_arts |
34.56 | 752 | 20% | 3760 downrated | 1 |
wiki_society |
32.60 | 813 | 20% | 4065 downrated | 1 |
wiki_linguistics |
27.44 | 949 | 20% | 4745 downrated | 1 |
wiki_physical_science |
44.93 | 627 | 20% | 3135 downrated | 1 |
wiki_history |
19.38 | 1371 | 20% | 6855 downrated | 1 |
early_modern_science |
0.00 | — | — | — | 0 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
11.01 | 2154 | 20% | 10770 downrated | 1 |
eu_parliament_debates |
2.72 | 4718 | 20% | 11000 capped | 1 |
openstax_science |
69.28 | 362 | 20% | 1810 downrated | 1 |
openstax_society |
33.37 | 856 | 20% | 4280 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.