| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [verb] a period | 31 |
|
| 2 | [verb] [vb pp] a period | 30 |
|
| 3 | [verb] [to-vb] a period | 20 |
|
| 4 | [vb past] [verb] a period | 12 |
|
| 5 | [vb -s] [verb] a period | 12 |
|
| 6 | [vb base] [verb] a period | 11 |
|
| 7 | [vb pp] [verb] a period | 10 |
|
| 8 | had [verb] a period | 9 |
|
| 9 | has [verb] a period | 8 |
|
| 10 | have [verb] a period | 7 |
|
| 11 | [verb] have a period | 7 |
|
| 12 | [verb] to have a period | 5 |
|
| 13 | [verb] enter a period | 5 |
|
| 14 | [verb] entered a period | 5 |
|
