| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] long period of time | 13 |
|
| 2 | [adv] long period [prep] time | 13 |
|
| 3 | [adv] long period of time | 13 |
|
| 4 | [adv] long period [prep] time | 10 |
|
| 5 | very long period [prep] time | 5 |
|
