| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] for which | 2673 |
|
| 2 | [noun sg] for which | 1571 |
|
| 3 | period [prep] which | 386 |
|
| 4 | period for [pron] | 50 |
|
| 5 | period for [Wh det] | 45 |
|
| 6 | period for which | 45 |
|
| 7 | period for which | 44 |
|
