| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] on for [adj] years | 14 |
|
| 2 | been going on for [adj] years | 12 |
|
| 3 | been [v-ing] on for [num] years | 9 |
|
| 4 | been [v-ing] on for [det] years | 5 |
|
