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