Base difficulty: Level 255 edit
Level distribution for noun (path_infrastructure): 24: 1 26: 8 115: 2 135: 1 219: 3 255: 9 405: 2 1020: 2 1050: 1 1399: 10
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
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 |
5.93 | 9139 | 100% | 9139 | 1 |
20th_books |
5.47 | 9322 | 100% | 9322 | 1 |
wiki_math |
35.80 | 2509 | 100% | 2509 | 1 |
wiki_geography |
205.26 | 615 | 100% | 615 | 1 |
wiki_biology |
55.56 | 2446 | 100% | 2446 | 1 |
wiki_modern_life |
279.74 | 408 | 100% | 408 | 1 |
wiki_arts |
78.96 | 1749 | 100% | 1749 | 1 |
wiki_society |
196.13 | 640 | 100% | 640 | 1 |
wiki_linguistics |
53.20 | 2272 | 100% | 2272 | 1 |
wiki_physical_science |
49.70 | 2720 | 100% | 2720 | 1 |
wiki_history |
76.58 | 1770 | 100% | 1770 | 1 |
early_modern_science |
19.74 | 4568 | 100% | 4568 | 1 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
256.22 | 496 | 100% | 496 | 1 |
eu_parliament_debates |
334.02 | 368 | 100% | 368 | 1 |
openstax_science |
225.25 | 616 | 100% | 616 | 1 |
openstax_society |
309.20 | 413 | 100% | 413 | 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.