| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | during [art] long period [prep] | 11 |
|
| 2 | during [art] long period of | 10 |
|
| 3 | during the long period [prep] | 7 |
|
| 4 | during a long period [prep] | 5 |
|
