| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a period | 832 |
|
| 2 | [noun sg] [prep] a period | 557 |
|
| 3 | [noun] over a period | 311 |
|
| 4 | [noun] over a period | 311 |
|
| 5 | [noun] for a period | 236 |
|
| 6 | [noun] for a period | 236 |
|
| 7 | [noun pl] [prep] a period | 218 |
|
| 8 | [noun] of a period | 67 |
|
| 9 | [noun] of a period | 67 |
|
| 10 | [noun] in a period | 44 |
|
| 11 | [noun] in a period | 44 |
|
| 12 | [noun] after a period | 44 |
|
| 13 | [noun] after a period | 44 |
|
| 14 | [noun prp] [prep] a period | 40 |
|
| 15 | [noun] during a period | 36 |
|
| 16 | [noun] during a period | 36 |
|
| 17 | [noun] within a period | 18 |
|
| 18 | [noun] within a period | 18 |
|
| 19 | [noun] to a period | 17 |
|
| 20 | [noun] with a period | 17 |
|
| 21 | [noun] to a period | 17 |
|
| 22 | [noun] with a period | 17 |
|
| 23 | [n mass] [prep] a period | 16 |
|
| 24 | place [prep] a period | 15 |
|
| 25 | place [prep] a period | 14 |
|
| 26 | end [prep] a period | 14 |
|
| 27 | end [prep] a period | 14 |
|
| 28 | [noun] as a period | 12 |
|
| 29 | [noun] as a period | 12 |
|
| 30 | beginning [prep] a period | 10 |
|
