| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [art] long period of | 215 |
|
| 2 | [art] long period of | 207 |
|
| 3 | a long period of | 183 |
|
| 4 | a long period of | 183 |
|
| 5 | the long period of | 31 |
|
| 6 | the long period of | 31 |
|
| 7 | [art] long periods of | 8 |
|
