No | Pattern | Freq | Relations |
---|---|---|---|
1 | levels of [noun sg] [noun sg] [prep] | 56 | |
2 | levels of [noun sg] [noun] in | 29 | |
3 | levels of [noun sg] [noun pl] [prep] | 10 | |
4 | levels of [noun sg] [noun] for | 8 | |
5 | levels of [noun sg] dioxide [prep] | 7 | |
6 | levels of [noun sg] dioxide [prep] | 7 |