| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| why was letter from birmingham jail written | 1.07 | 0.6 | 3028 | 56 | 43 |
| why | 0.56 | 1 | 2292 | 8 | 3 |
| was | 0.7 | 0.1 | 6915 | 83 | 3 |
| letter | 0.58 | 0.8 | 3214 | 78 | 6 |
| from | 0.37 | 0.9 | 7690 | 18 | 4 |
| birmingham | 0.16 | 0.2 | 2822 | 2 | 10 |
| jail | 1.38 | 0.6 | 9549 | 27 | 4 |
| written | 1.69 | 0.7 | 2746 | 32 | 7 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| why was letter from birmingham jail written | 1.8 | 0.5 | 918 | 70 |
