| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| railroad lines in 1860 | 1.27 | 1 | 6904 | 11 | 22 |
| railroad | 0.95 | 0.1 | 8004 | 39 | 8 |
| lines | 1.89 | 0.2 | 2056 | 45 | 5 |
| in | 1.4 | 0.3 | 1069 | 86 | 2 |
| 1860 | 0.22 | 0.7 | 7408 | 22 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| railroad lines in 1860 | 0.73 | 0.6 | 8323 | 17 |
| us railroads in 1860 | 1.31 | 0.9 | 1766 | 18 |
| railroads in 1860 map | 1.86 | 1 | 8835 | 59 |
| major railroads in 1860 | 0.16 | 0.3 | 8614 | 68 |
| map of us railroads in 1860 | 1.04 | 0.3 | 9235 | 79 |
| us railroad map 1860 | 1.45 | 1 | 3262 | 79 |
| map of railroads usa 1860 | 1.67 | 0.4 | 1753 | 78 |
| map comparing railroads from 1860 to 1900 | 0.86 | 0.7 | 2569 | 24 |
| underground railroad 1850 1860 | 0.3 | 1 | 2709 | 48 |
| railroads in the 1850s | 0.85 | 0.2 | 6192 | 85 |
| railroad in the 1800s | 1.65 | 1 | 552 | 55 |
| railroad routes in the 1880s | 1.33 | 0.7 | 9724 | 37 |
| railroads in the late 1800s | 0.48 | 0.2 | 8057 | 3 |
| railroad completed in 1869 | 1.93 | 0.5 | 6844 | 95 |
| map of us railroads in 1850 | 0.93 | 0.4 | 1885 | 92 |
| us railroad map 1861 | 1.74 | 0.6 | 1193 | 31 |
| railroads in the early 1800s | 0.7 | 0.1 | 4056 | 24 |
| railroad map from 1800s | 0.56 | 0.1 | 4416 | 52 |
| transportation in the 1860s | 1.74 | 1 | 2504 | 96 |
| railroads in the 1800s maps | 1.74 | 0.6 | 6908 | 38 |
| railroads in the north 1800s | 1.36 | 0.2 | 6278 | 55 |
