| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | introduce for the first time [prep] | 8 |
|
| 2 | introduce [prep] the first time [prep] | 8 |
|
| 3 | introduced [prep] the first time [prep] | 7 |
|
| 4 | introduce [prep] the first time in | 5 |
|
