| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a long period | 391 |
|
| 2 | after a long [noun] | 289 |
|
| 3 | after a long [noun sg] | 287 |
|
| 4 | after a [adj] period | 130 |
|
| 5 | after [art] long period | 24 |
|
| 6 | after a long period | 22 |
|
