| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for a long period of time | 17 |
|
| 2 | for a long period [prep] time | 17 |
|
| 3 | for a long period of time | 17 |
|
| 4 | for a long period [prep] time | 17 |
|
| 5 | for a long period [prep] time | 14 |
|
