| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [vb pp] in the [adj] 1970s | 6 |
|
| 2 | [verb] [vb pp] in the [adj] 1970s | 6 |
|
| 3 | [verb] [vb pp] in the early 1970s | 5 |
|
| 4 | [verb] [vb pp] in the early 1970s | 5 |
|
