| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [prep] a period | 557 |
|
| 2 | [noun sg] over a period | 180 |
|
| 3 | [noun sg] for a period | 160 |
|
| 4 | [noun sg] of a period | 64 |
|
| 5 | [noun sg] after a period | 31 |
|
| 6 | [noun sg] in a period | 27 |
|
| 7 | [noun sg] during a period | 21 |
|
| 8 | [noun sg] to a period | 16 |
|
| 9 | place [prep] a period | 14 |
|
| 10 | [noun sg] with a period | 14 |
|
| 11 | [noun sg] within a period | 14 |
|
| 12 | end [prep] a period | 14 |
|
| 13 | [noun sg] as a period | 9 |
|
| 14 | beginning [prep] a period | 9 |
|
| 15 | work [prep] a period | 8 |
|
| 16 | office [prep] a period | 6 |
|
| 17 | company [prep] a period | 6 |
|
| 18 | [noun sg] from a period | 6 |
|
| 19 | market [prep] a period | 5 |
|
