| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | long period of [noun sg] | 202 |
|
| 2 | long period [prep] [noun sg] | 186 |
|
| 3 | long period [prep] time | 131 |
|
| 4 | longer period [prep] [noun sg] | 22 |
|
| 5 | longest period [prep] [noun sg] | 8 |
|
| 6 | long period in [noun sg] | 7 |
|
