| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a period of | 1599 |
|
| 2 | [prep] a period of | 1599 |
|
| 3 | during [art] period of | 365 |
|
| 4 | during [art] period of | 365 |
|
| 5 | during a [noun] of | 214 |
|
| 6 | during a [noun sg] of | 196 |
|
| 7 | during a period [prep] | 83 |
|
| 8 | during a period [prep] | 83 |
|
| 9 | during a period of | 72 |
|
| 10 | during a period of | 72 |
|
| 11 | during a period of | 72 |
|
| 12 | during a period of | 72 |
|
