| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] in 1988 | 227 |
|
| 2 | published in 1988 | 14 |
|
| 3 | established in 1988 | 12 |
|
| 4 | formed in 1988 | 10 |
|
| 5 | launched in 1988 | 10 |
|
| 6 | introduced in 1988 | 8 |
|
| 7 | founded in 1988 | 7 |
|
| 8 | issued in 1988 | 6 |
|
| 9 | reported in 1988 | 5 |
|
