| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at the low level | 83 |
|
| 2 | at the low level | 46 |
|
| 3 | at the lowest level | 42 |
|
| 4 | at the lower level | 40 |
|
| 5 | at the low levels | 37 |
|
