| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in [noun sg] [prep] a period | 21 |
|
| 2 | in [noun sg] over a period | 10 |
|
| 3 | in [noun sg] over a period | 10 |
|
| 4 | in [noun sg] of a period | 5 |
|
| 5 | in [noun sg] of a period | 5 |
|
