| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| railroads definition history | 0.22 | 1 | 9178 | 58 | 28 |
| railroads | 0.24 | 0.8 | 8826 | 52 | 9 |
| definition | 0.32 | 0.4 | 2369 | 41 | 10 |
| history | 0.63 | 0.4 | 986 | 15 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| railroads definition history | 1.29 | 0.5 | 317 | 95 |
| underground railroad definition us history | 0.48 | 0.6 | 5425 | 100 |
| transcontinental railroad definition history | 0.42 | 0.4 | 8679 | 68 |
| underground railroad definition and history | 0.49 | 0.3 | 2564 | 1 |
| railroads us history definition | 1.59 | 0.9 | 3584 | 38 |
| underground railroad definition in history | 1.18 | 1 | 1073 | 34 |
