| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [adj] [prep] a period of | 13 |
|
| 2 | [be] [adj] [prep] a period of | 13 |
|
| 3 | [be] [adj] [prep] a period of | 6 |
|
| 4 | be [adj] [prep] a period of | 6 |
|
| 5 | [verb] [adj] [prep] a period of | 6 |
|
| 6 | [adv] [adj] [prep] a period of | 5 |
|
| 7 | [adv] [adj] [prep] a period of | 5 |
|
| 8 | [adj] [noun] [prep] a period of | 139 |
|
| 9 | [adj] [noun sg] [prep] a period of | 86 |
|
| 10 | [adj] [noun pl] [prep] a period of | 51 |
|
| 11 | [adj] [prep] a [adj] period of | 14 |
|
| 12 | [adj] [prep] a [adj] period of | 13 |
|
| 13 | [adj] [prep] a period of [adj] | 16 |
|
| 14 | [adj] [prep] a period of [noun] | 15 |
|
| 15 | [adj] [prep] a period of [num] | 10 |
|
| 16 | [adj] [prep] a period of [noun pl] | 8 |
|
| 17 | [adj] [prep] a period of years | 7 |
|
| 18 | [adj] [prep] a period of [noun sg] | 7 |
|
| 19 | [adj] [prep] a period of year | 7 |
|
| 20 | [adj] [prep] a period of [adv] | 6 |
|
| 21 | [adj] [prep] a period of [adj] | 6 |
|
