| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| railroads definition history | 1.07 | 1 | 943 | 37 | 28 |
| railroads | 0.89 | 0.5 | 4658 | 86 | 9 |
| definition | 1.84 | 0.6 | 7465 | 36 | 10 |
| history | 1.48 | 0.9 | 9137 | 30 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| railroads definition history | 1.56 | 0.6 | 9304 | 21 |
| underground railroad definition us history | 1.3 | 0.8 | 1070 | 83 |
| transcontinental railroad definition history | 1.98 | 0.7 | 4777 | 52 |
| underground railroad definition and history | 1.45 | 0.6 | 2466 | 13 |
| railroads us history definition | 1.44 | 0.5 | 5158 | 57 |
| underground railroad definition in history | 1.39 | 0.3 | 9591 | 31 |
