| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | introduce for [art] [num ord] time [prep] | 8 |
|
| 2 | introduce for [art] [num ord] time [prep] | 8 |
|
| 3 | introduce for [art] first time [prep] | 8 |
|
| 4 | introduce for the [num ord] time [prep] | 8 |
|
| 5 | introduce for the [num ord] time [prep] | 8 |
|
| 6 | introduced for [art] [num ord] time [prep] | 7 |
|
| 7 | introduce for [art] [num ord] time in | 5 |
|
| 8 | introduce for [art] [num ord] time in | 5 |
|
