| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] long period [prep] | 159 |
|
| 2 | [prep] [adj] period in | 102 |
|
| 3 | [prep] long [noun] in | 87 |
|
| 4 | [prep] [adj] period in | 45 |
|
| 5 | [prep] long period in | 16 |
|
