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

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did alcatraz close as a prison	1.97	0.9	8642	62	35
when	1.79	0.2	4563	38	4
did	1.63	1	8755	29	3
alcatraz	0.73	0.5	9567	47	8
close	0.04	1	3176	74	5
as	1.6	0.6	7568	92	2
a	1.41	0.7	4376	65	1
prison	1.71	0.9	1831	63	6

Keyword	CPC	PCC	Volume	Score
when did alcatraz close as a prison	0.86	0.2	5050	40
why did alcatraz prison close	1.79	0.5	2448	68
why did they close alcatraz prison	1.74	0.2	8347	97
when did alcatraz prison open and close	0.11	0.1	8579	74
what year did alcatraz prison close	1.15	0.5	8626	47
when did alcatraz prison close	1.64	0.2	9833	87
why was alcatraz prison closed	1.4	0.1	3597	14
why alcatraz prison closed	0.77	0.1	8243	33
alcatraz prison why did it close	0.93	0.4	9691	97