| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | had [been] [verb] for | 1516 |
|
| 2 | had [been] [vb pp] for | 1015 |
|
| 3 | have [been] used for | 195 |
|
| 4 | [verb] [been] used for | 195 |
|
| 5 | had [been] used [prep] | 150 |
|
| 6 | had [been] used [prep] | 150 |
|
| 7 | had [been] use for | 38 |
|
| 8 | [vb past] [been] used for | 36 |
|
| 9 | had [be] used for | 36 |
|
| 10 | had [been] used for | 36 |
|
