Keyword Analysis & Research: when was first printing press invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was first printing press invented	1.62	0.9	4731	66	38
when	1.45	0.6	4595	27	4
was	1.11	0.4	9312	11	3
first	1.81	0.2	4290	93	5
printing	0.89	0.8	9363	73	8
press	0.03	0.7	2219	65	5
invented	0.98	1	3159	26	8

Keyword	CPC	PCC	Volume	Score
when was first printing press invented	1.93	0.6	6716	58