| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | in which [verb] [pron] | 168 |
|
| 2 | environment in which [pron] | 87 |
|
| 3 | environment in which [verb] | 27 |
|
| 4 | environment which [verb] [pron] | 10 |
|
