what period did humans first appear on earth

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what period did humans first appear on earth	0.09	0.7	2842	39	44
what	1.52	1	8689	94	4
period	1.62	0.3	9796	43	6
did	1.64	0.3	7392	14	3
humans	0.01	0.8	666	67	6
first	1.55	0.7	6471	49	5
appear	0.28	0.9	8537	86	6
on	0.47	0.6	2376	60	2
earth	0.72	0.8	9178	38	5

Keyword	CPC	PCC	Volume	Score
what period did humans first appear on earth	0.06	0.4	980	68
when did humans first appear on earth period	0.48	0.9	2375	52
when did first humans appear on earth	1.15	0.7	277	65
in what period did humans appear	0.63	0.7	3587	65
in what era did humans first appear	0.31	0.9	6705	70
when did humans first exist on earth	1.14	0.4	144	76
what year were humans first on earth	0.63	0.8	3858	83
when the first humans appeared on earth	1.93	1	2910	86
when did humans begin on earth	0.53	0.4	7584	39
when did first human appear on earth	0.08	0.1	4197	69
when were modern humans first on earth	1.41	0.9	2336	84
during which period did humans appear	0.11	0.5	3198	67
what time period did humans appear	0.63	0.6	8182	5