| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period of [adv] [adj] | 148 |
|
| 2 | [noun] of [adv] four | 75 |
|
| 3 | [noun sg] of [adv] four | 64 |
|
| 4 | period [prep] [adv] four | 7 |
|
| 5 | period of [adv] four | 6 |
|
