| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [coord] [prep] a period | 14 |
|
| 2 | [noun sg] and [prep] a period | 12 |
|
| 3 | [noun sg] [coord] over a period | 6 |
|
| 4 | [noun sg] [coord] over a period | 6 |
|
