| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [det] for [adj] years | 8 |
|
| 2 | [been] [v-ing] [det] for [num] years | 8 |
|
| 3 | [been] [v-ing] this for [adj] years | 6 |
|
| 4 | [been] doing [det] for [adj] years | 6 |
|
