| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | happen [prep] the time | 24 |
|
| 2 | happen [prep] the time | 24 |
|
| 3 | happen [prep] the time | 24 |
|
| 4 | happen at the time | 16 |
|
| 5 | happen at the time | 16 |
|
| 6 | happening [prep] the time | 9 |
|
| 7 | happened [prep] the time | 7 |
|
