| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | introduce [prep] the first [noun sg] [prep] | 13 |
|
| 2 | introduced [prep] the first [noun] [prep] | 12 |
|
| 3 | introduce for the first [noun] [prep] | 8 |
|
| 4 | introduce [prep] the first time [prep] | 8 |
|
| 5 | introduce [prep] the first time [prep] | 8 |
|
| 6 | introduce [prep] the first [noun] in | 5 |
|
