| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at the low [noun pl] [prep] [noun] | 9 |
|
| 2 | at [art] low [noun pl] of [noun] | 8 |
|
| 3 | at [art] low [noun pl] [prep] [noun sg] | 8 |
|
| 4 | at [art] low levels [prep] [noun] | 7 |
|
| 5 | at [art] lower [noun pl] [prep] [noun] | 5 |
|
