| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [prep] the [adj] period | 280 |
|
| 2 | [vb pp] [prep] the [adj] in | 135 |
|
| 3 | [prep] the [adj] period in | 135 |
|
| 4 | [vb pp] [prep] [adj] period in | 20 |
|
| 5 | [vb pp] [prep] the period in | 12 |
|
