| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| national archives railroad records | 1.18 | 0.6 | 6942 | 82 | 34 |
| national | 0.77 | 0.1 | 5956 | 96 | 8 |
| archives | 1.83 | 0.2 | 429 | 71 | 8 |
| railroad | 1.1 | 0.4 | 3082 | 86 | 8 |
| records | 1.02 | 0.5 | 8774 | 80 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| national archives railroad records | 1.44 | 0.5 | 6840 | 73 |
| national archives historical records | 0.87 | 1 | 7519 | 43 |
| national archives online records | 0.32 | 0.9 | 9870 | 38 |
| national records and archives | 0.77 | 0.6 | 6345 | 64 |
| national archives federal records | 0.86 | 0.5 | 2844 | 65 |
| national archives free online records | 1.44 | 0.6 | 4869 | 61 |
| national archives and records information | 0.2 | 0.3 | 5887 | 5 |
| national archives records search | 0.48 | 0.1 | 2134 | 8 |
| national archives and records service online | 1.85 | 0.7 | 9594 | 34 |
| national archives ship records | 0.65 | 0.6 | 4712 | 11 |
| national archives service records | 0.44 | 0.1 | 8327 | 31 |
| national archives request records | 1.83 | 1 | 5443 | 85 |
| national archives records retrieval | 0.77 | 0.6 | 1181 | 85 |
| records in the national archives | 1.7 | 0.8 | 4058 | 99 |
| national archives and records service | 1.07 | 1 | 7327 | 14 |
| national archive records online | 1.14 | 0.1 | 2931 | 90 |
| national railway museum archives | 0.8 | 0.1 | 8767 | 85 |
| national records archive search | 1.98 | 0.5 | 1013 | 69 |
| railroad picture archive history | 0.56 | 0.6 | 4339 | 22 |
