Keyword Analysis & Research: when was the gulag created

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the gulag created	0.43	0.2	1561	98	26
when	1.56	0.3	7655	54	4
was	1.67	0.6	5190	52	3
the	1.54	0.3	1637	66	3
gulag	1.1	0.2	9268	47	5
created	0.86	0.4	5754	100	7

Keyword	CPC	PCC	Volume	Score
when was the gulag created	0.26	0.6	4306	99
who created the gulag	1.8	0.9	7392	69
why was the gulag created	0.11	0.7	1708	52
what led to the gulag being created	1.06	1	6835	32
who created to gulag in 1917	0.02	0.9	2985	59
what was the gulag	0.28	0.6	4198	91
what was the soviet gulag	1.15	0.5	2775	41
where was the gulag located	1.04	0.6	1711	15
gulag definition world history	1.86	0.6	9099	52
gulag a history pages	0.54	0.3	2712	28
why did the gulags start	1.14	1	7951	84