| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [v-ing] [noun pl] | 3361 |
|
| 2 | system for [v-ing] | 271 |
|
| 3 | system for [noun pl] | 80 |
|
| 4 | system [v-ing] [noun pl] | 13 |
|
