| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] of [adv] | 21599 |
|
| 2 | period of [adv] | 307 |
|
| 3 | period [prep] [adv] | 270 |
|
| 4 | period [prep] [adv] | 270 |
|
| 5 | period of [adv] | 226 |
|
