| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| number density of mercury | 0.78 | 1 | 1222 | 29 | 25 |
| number | 0.15 | 0.4 | 8391 | 72 | 6 |
| density | 0.42 | 0.4 | 4610 | 36 | 7 |
| of | 1.75 | 1 | 5918 | 90 | 2 |
| mercury | 0.78 | 0.9 | 1041 | 7 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| number density of mercury | 0.03 | 0.9 | 1404 | 21 |
