| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| when did prisons start | 1.41 | 0.2 | 3091 | 6 | 22 |
| when | 0.8 | 0.9 | 4127 | 61 | 4 |
| did | 1.76 | 0.7 | 2674 | 9 | 3 |
| prisons | 0.86 | 0.9 | 7515 | 29 | 7 |
| start | 1.25 | 0.6 | 9782 | 21 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| when did prisons start | 0.15 | 0.5 | 8979 | 2 |
