| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period of [adj] | 57 |
|
| 2 | [prep] a [adj] period of [adj] | 57 |
|
| 3 | [prep] a long period of [adj] | 16 |
|
| 4 | [prep] a long period of [adj] | 16 |
|
| 5 | of a [adj] period of [adj] | 11 |
|
| 6 | of a [adj] period of [adj] | 11 |
|
| 7 | to a [adj] period of [adj] | 10 |
|
| 8 | after a [adj] period of [adj] | 10 |
|
| 9 | after a [adj] period of [adj] | 10 |
|
| 10 | to a [adj] period of [adj] | 10 |
|
| 11 | [prep] a prolonged period of [adj] | 6 |
|
| 12 | [prep] a prolonged period of [adj] | 6 |
|
