| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| oil gas coal formation | 0.53 | 0.7 | 3563 | 38 | 22 |
| oil | 0.92 | 0.4 | 7015 | 19 | 3 |
| gas | 0.22 | 0.4 | 3948 | 97 | 3 |
| coal | 1.07 | 1 | 4953 | 29 | 4 |
| formation | 0.98 | 0.5 | 703 | 80 | 9 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| oil gas coal formation | 1.37 | 1 | 6634 | 54 |
| formation of coal oil and natural gas | 1.96 | 0.7 | 4505 | 11 |
| formation of coal oil and gas | 0.91 | 0.5 | 7234 | 74 |
| oil natural gas and coal form from | 0.08 | 0.8 | 340 | 2 |
| coal and petroleum formation | 0.48 | 0.3 | 3966 | 88 |
| how is oil and coal formed | 0.97 | 0.8 | 172 | 37 |
| how are coal and oil formed | 1.53 | 0.4 | 1477 | 39 |
| oil gas and coal | 1.66 | 1 | 7963 | 24 |
| the formation of coal | 0.32 | 0.4 | 5608 | 62 |
| oil and gas formation | 0.3 | 0.6 | 740 | 81 |
| what is coal formation | 1.99 | 0.2 | 562 | 96 |
| how coal and petroleum oil are formed | 1.49 | 0.8 | 3103 | 95 |
| describe how coal and oil/gas form | 0.83 | 0.4 | 656 | 2 |
| oil from coal process | 1.54 | 0.7 | 7637 | 7 |
| process of coal formation | 1.34 | 0.9 | 7860 | 91 |
| explain the formation of coal | 1.91 | 0.6 | 7206 | 70 |
| formation of coal deposits | 1.47 | 1 | 7910 | 68 |
| describe the formation of coal | 1.14 | 0.3 | 6596 | 13 |
| oil from coal process pdf | 0.34 | 1 | 8230 | 97 |
