| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long time | 1727 |
|
| 2 | [prep] a long time | 1727 |
|
| 3 | [prep] [prep] a long | 16 |
|
| 4 | [prep] [prep] a time | 9 |
|
