| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun prp] [prep] a period of | 15 |
|
| 2 | [prep] [noun prp] [prep] a period of | 15 |
|
| 3 | [noun] [noun prp] [prep] a period of | 6 |
|
| 4 | [noun prp] [noun prp] [prep] a period of | 5 |
|
| 5 | [noun prp] [verb] [prep] a period of | 12 |
|
| 6 | [noun prp] [noun] [prep] a period of | 11 |
|
| 7 | [noun prp] [vb past] [prep] a period of | 9 |
|
| 8 | [noun prp] [noun prp] [prep] a period of | 5 |
|
| 9 | [noun prp] [prep] a [adj] period of | 5 |
|
| 10 | [noun prp] [prep] a period of [adj] | 17 |
|
| 11 | [noun prp] [prep] a period of [num] | 12 |
|
| 12 | [noun prp] [prep] a period of [noun] | 10 |
|
| 13 | [noun prp] [prep] a period of [noun sg] | 7 |
|
