| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [prep] a period | 506 |
|
| 2 | [vb pp] [prep] a period | 269 |
|
| 3 | [verb] for a period | 105 |
|
| 4 | [verb] for a period | 105 |
|
| 5 | [verb] over a period | 83 |
|
| 6 | [verb] over a period | 83 |
|
| 7 | [vb past] [prep] a period | 62 |
|
| 8 | [v-ing] [prep] a period | 54 |
|
| 9 | [verb] through a period | 49 |
|
| 10 | [verb] through a period | 49 |
|
| 11 | [verb] in a period | 43 |
|
| 12 | [verb] in a period | 43 |
|
| 13 | [vb infin] [prep] a period | 39 |
|
| 14 | go [prep] a period | 39 |
|
| 15 | [verb] by a period | 33 |
|
| 16 | [verb] by a period | 33 |
|
| 17 | [vb -s] [prep] a period | 32 |
|
| 18 | [verb] to a period | 31 |
|
| 19 | [verb] to a period | 31 |
|
| 20 | [verb] during a period | 28 |
|
| 21 | [verb] during a period | 28 |
|
| 22 | [verb] with a period | 26 |
|
| 23 | [to-vb] [prep] a period | 26 |
|
| 24 | [verb] with a period | 26 |
|
| 25 | [vb base] [prep] a period | 24 |
|
| 26 | [verb] after a period | 22 |
|
| 27 | [verb] after a period | 22 |
|
| 28 | [verb] as a period | 21 |
|
| 29 | [verb] as a period | 21 |
|
| 30 | [verb] within a period | 19 |
|
