| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a period of | 1599 |
|
| 2 | [prep] a period of | 1599 |
|
| 3 | after a [noun] of | 1095 |
|
| 4 | after a [noun sg] of | 978 |
|
| 5 | after a period [prep] | 154 |
|
| 6 | after a period [prep] | 154 |
|
| 7 | after [art] period of | 132 |
|
| 8 | after [art] period of | 132 |
|
| 9 | after a period of | 128 |
|
| 10 | after a period of | 128 |
|
| 11 | after a period of | 128 |
|
| 12 | after a period of | 128 |
|
