| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have occurred [adv] since | 7 |
|
| 2 | [Wh det] have occurred [adv] since | 7 |
|
| 3 | which have occurred [adv] since | 7 |
|
| 4 | which have occurred [adv] since | 7 |
|
| 5 | have occurred [adv] since [art] | 7 |
|
| 6 | have occurred [adv] since [art] | 7 |
|
| 7 | have occurred [adv] since the | 7 |
|
| 8 | have occurred [adv] since the | 7 |
|
