| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| theory of safety valve | 0.94 | 0.5 | 7537 | 59 | 22 |
| theory | 0.83 | 0.1 | 8530 | 41 | 6 |
| of | 1.73 | 0.1 | 4219 | 7 | 2 |
| safety | 1.51 | 0.8 | 6362 | 86 | 6 |
| valve | 1.86 | 1 | 3963 | 50 | 5 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| theory of safety valve | 1.91 | 0.8 | 3543 | 32 |
