| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] long period [prep] time | 117 |
|
| 2 | [art] long period [prep] time | 117 |
|
| 3 | [art] long period of time | 117 |
|
| 4 | a long period [prep] time | 115 |
|
| 5 | a long period [prep] time | 115 |
|
| 6 | [art] long period [prep] time | 102 |
|
| 7 | [art] longer period [prep] time | 13 |
|
