| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a period [prep] | 461 |
|
| 2 | the [noun sg] [prep] a period | 125 |
|
| 3 | the [noun sg] [prep] period [prep] | 21 |
|
| 4 | the [noun sg] [prep] a [prep] | 19 |
|
