| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the [noun] [prep] a period | 145 |
|
| 2 | the [noun sg] [prep] a period | 125 |
|
| 3 | the [noun] of a period | 44 |
|
| 4 | the [noun] over a period | 42 |
|
| 5 | the [noun] for a period | 41 |
|
| 6 | the [noun pl] [prep] a period | 17 |
|
| 7 | the end [prep] a period | 13 |
|
| 8 | the end [prep] a period | 13 |
|
| 9 | the beginning [prep] a period | 9 |
|
| 10 | the beginning [prep] a period | 9 |
|
