Base difficulty: Level 205 edit
Level distribution for noun (tool): 19: 2 205: 31 460: 2 1000: 15 1040: 13 1050: 1 1078: 5 1090: 2 1203: 1 1209: 1 1210: 7 1216: 1 1221: 1 1222: 2 1224: 8 1399: 4
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Tier Signals
| Source | Tier | Rank used |
|---|---|---|
basic_english |
Basic (1 of 2) | 600 |
cambridge_yle |
Movers (2 of 3) | 750 |
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 |
92.04 | 1216 | 100% | 962 | 2 |
20th_books |
45.01 | 2493 | 100% | 1739 | 2 |
wiki_math |
266.78 | 754 | 100% | 488 | 2 |
wiki_geography |
0.00 | — | — | — | 0 |
wiki_biology |
0.00 | — | — | — | 0 |
wiki_modern_life |
732.09 | 238 | 100% | 140 | 2 |
wiki_arts |
90.19 | 2634 | 100% | 1519 | 2 |
wiki_society |
65.26 | 3429 | 100% | 2036 | 2 |
wiki_linguistics |
41.38 | 2779 | 100% | 2779 | 1 |
wiki_physical_science |
35.39 | 3555 | 100% | 3555 | 1 |
wiki_history |
48.61 | 2810 | 100% | 2810 | 1 |
early_modern_science |
151.11 | 866 | 100% | 724 | 2 |
religious_translated |
0.00 | — | — | — | 0 |
cooking |
0.00 | — | — | — | 0 |
legal_scotus |
28.54 | 4851 | 100% | 2826 | 2 |
eu_parliament_debates |
0.00 | — | — | — | 0 |
openstax_science |
51.12 | 4139 | 100% | 2131 | 2 |
openstax_society |
103.75 | 2494 | 100% | 1278 | 2 |
wpa_life_histories |
215.79 | 735 | 100% | 474 | 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.