| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [v-ing] [adv] for [det] [noun pl] | 15 |
|
| 2 | [been] [v-ing] [adv] for several [noun pl] | 8 |
|
| 3 | [been] [v-ing] [adv] for [det] years | 5 |
|
