| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [v-ing] for [noun] | 301 |
|
| 2 | [been] [v-ing] for [noun pl] | 184 |
|
| 3 | [been] [verb] for centuries | 38 |
|
| 4 | [been] [v-ing] [prep] centuries | 5 |
|
| 5 | [been] [v-ing] for century | 5 |
|
| 6 | [been] [v-ing] [prep] centuries | 5 |
|
| 7 | [been] [v-ing] for centuries | 5 |
|
| 8 | [be] [v-ing] for centuries | 5 |
|
