| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it is [adv] rare for | 29 |
|
| 2 | it is [adv] rare for | 28 |
|
| 3 | it is very rare for | 11 |
|
| 4 | it is very rare for | 11 |
|
| 5 | it is extremely rare for | 7 |
|
| 6 | it is extremely rare for | 7 |
|
