| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [be] common practice | 50 |
|
| 2 | [pers pn] [be] common practice | 50 |
|
| 3 | [pers pn] be common practice | 50 |
|
| 4 | [pers pn] [is] common practice | 39 |
|
| 5 | [pers pn] is common practice | 35 |
|
| 6 | [pers pn] [was/were] common practice | 11 |
|
| 7 | [pers pn] was common practice | 11 |
|
