| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [vb pp] long periods | 11 |
|
| 2 | [verb] [vb pp] long periods | 10 |
|
| 3 | [verb] spent long periods | 6 |
|
| 4 | have [vb pp] long periods | 6 |
|
| 5 | [vb base] [vb pp] long periods | 6 |
|
