| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a period [prep] [adj] | 256 |
|
| 2 | [prep] a period of [adj] | 252 |
|
| 3 | in a period [prep] [adj] | 54 |
|
| 4 | in a period [prep] [adj] | 54 |
|
| 5 | after a period [prep] [adj] | 47 |
|
| 6 | after a period [prep] [adj] | 47 |
|
| 7 | during a period [prep] [adj] | 39 |
|
| 8 | during a period [prep] [adj] | 39 |
|
| 9 | by a period [prep] [adj] | 18 |
|
| 10 | of a period [prep] [adj] | 18 |
|
| 11 | of a period [prep] [adj] | 18 |
|
| 12 | by a period [prep] [adj] | 18 |
|
| 13 | through a period [prep] [adj] | 17 |
|
| 14 | through a period [prep] [adj] | 17 |
|
| 15 | [prep] a period [prep] rapid | 12 |
|
| 16 | as a period [prep] [adj] | 11 |
|
| 17 | with a period [prep] [adj] | 11 |
|
| 18 | with a period [prep] [adj] | 11 |
|
| 19 | as a period [prep] [adj] | 11 |
|
| 20 | [prep] a period [prep] economic | 10 |
|
| 21 | [prep] a period [prep] high | 10 |
|
| 22 | [prep] a period [prep] relative | 10 |
|
| 23 | for a period [prep] [adj] | 9 |
|
| 24 | for a period [prep] [adj] | 9 |
|
| 25 | [prep] a period [prep] prolonged | 8 |
|
| 26 | [prep] a period [prep] great | 8 |
|
| 27 | to a period [prep] [adj] | 7 |
|
| 28 | to a period [prep] [adj] | 7 |
|
| 29 | [prep] a period [prep] sustained | 7 |
|
| 30 | from a period [prep] [adj] | 6 |
|
