| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | follow up period [prep] | 6 |
|
| 2 | follow [adv] period [prep] | 6 |
|
| 3 | follow [adv prt] period [prep] | 6 |
|
| 4 | follow up period [prep] | 6 |
|
