Keyword Analysis & Research: when did alcatraz open as a prison

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did alcatraz open as a prison	1.78	1	8135	37	34
when	1.07	0.3	7636	20	4
did	1.25	0.5	5349	67	3
alcatraz	0.26	0.2	5556	30	8
open	1.54	0.9	4807	10	4
as	1.2	0.1	4108	95	2
a	0.26	1	5535	38	1
prison	0.59	0.6	2306	90	6

Keyword	CPC	PCC	Volume	Score
when did alcatraz open as a prison	0.4	0.4	7273	55