Keyword Analysis & Research: when did call of duty first start

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when did call of duty first start	0.16	0.7	5162	53	33
when	1.96	1	648	72	4
did	0.45	0.2	4010	15	3
call	0.66	0.9	9842	33	4
of	1.37	0.1	1483	24	2
duty	0.08	0.4	8586	72	4
first	1.39	0.8	3204	92	5
start	0.59	0.2	5395	70	5

Keyword	CPC	PCC	Volume	Score
when did call of duty first start	0.66	0.5	9224	16
when was call of duty first released	0.94	0.7	2285	31
who made the first call of duty	1.52	0.5	1458	34
who created the first call of duty	1.76	0.2	443	51
what was the first call of duty	1.52	0.8	2779	83
history of call of duty	0.41	0.2	5663	18
when was call of duty invented	1.72	0.2	2140	28
first call of duty ever made	0.93	0.6	3349	99
when was call of duty launched	1.48	0.4	3248	100
when was call of duty founded	0.01	0.2	6543	50
when was call of duty 1 made	0.59	0.5	2957	89
what year was call of duty made	0.53	0.3	5863	55