| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [been] [verb] since | 41 |
|
| 2 | not [been] [vb pp] since | 40 |
|
| 3 | not [been] seen [conj] | 20 |
|
| 4 | [adv] [been] seen since | 17 |
|
| 5 | not [be] seen since | 15 |
|
| 6 | not [been] see since | 15 |
|
