| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] is [vb pp] [art] [num] years | 7 |
|
| 2 | [pron] is [vb pp] every [adj] years | 7 |
|
| 3 | [pron] is [vb pp] [art] [adj] years | 7 |
|
| 4 | [pron] is [vb pp] every [adj] years | 7 |
|
| 5 | which is [vb pp] [art] [adj] years | 6 |
|
| 6 | [Wh det] is [vb pp] [art] [adj] years | 6 |
|
| 7 | which is [vb pp] [art] [adj] years | 6 |
|
