| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | the period of [adj] | 149 |
|
| 2 | the period [prep] industrial | 12 |
|
| 3 | the period [prep] compulsory | 7 |
|
| 4 | the period [prep] military | 5 |
|
| 5 | the period between [adj] | 5 |
|
| 6 | the period [prep] rapid | 5 |
|
