| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | drop in for | 27 |
|
| 2 | drop in for | 27 |
|
| 3 | drop in for | 5 |
|
| 4 | dropping in for | 5 |
|
| 5 | drops in for | 5 |
|
| 6 | dropped in for | 5 |
|
