| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] which had been | 47 |
|
| 2 | [conj] which had been | 47 |
|
| 3 | and which had been | 31 |
|
| 4 | and which had been | 31 |
|
| 5 | but which had been | 16 |
|
| 6 | but which had been | 16 |
|
