| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| history of water purification | 1.06 | 0.4 | 4284 | 98 | 29 |
| history | 0.42 | 0.7 | 5725 | 59 | 7 |
| of | 0.3 | 0.3 | 8712 | 27 | 2 |
| water | 1.35 | 0.1 | 9674 | 84 | 5 |
| purification | 1.21 | 0.8 | 4540 | 10 | 12 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| history of water purification | 0.21 | 0.4 | 7279 | 12 |
