| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [verb] a [adj] [noun] of | 3283 |
|
| 2 | [adv] [verb] a [adj] period [prep] | 24 |
|
| 3 | [adv] [verb] [art] [adj] period of | 24 |
|
| 4 | [adv] [verb] [art] [adj] period of | 24 |
|
| 5 | [adv] [verb] a [adj] period of | 20 |
|
