| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which had [verb] for | 56 |
|
| 2 | which had [vb pp] for | 55 |
|
| 3 | which had exist for | 7 |
|
| 4 | which had existed for | 7 |
|
| 5 | which had last for | 6 |
|
| 6 | which had lasted for | 6 |
|
