| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [noun] [prep] [noun sg] | 104134 |
|
| 2 | [art] levels [prep] [noun sg] | 214 |
|
| 3 | a level [prep] [noun sg] | 201 |
|
| 4 | a [noun pl] [prep] [noun sg] | 65 |
|
| 5 | a levels [prep] [noun sg] | 5 |
|
| 6 | a levels [prep] [noun] | 5 |
|
