when was the printing press invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the printing press invented	0.56	0.2	9439	83	36
when	1.68	0.6	3200	36	4
was	1.81	0.8	3058	57	3
the	0.45	0.2	3992	95	3
printing	0.91	1	1559	84	8
press	0.52	0.8	5445	20	5
invented	1.71	0.8	5882	93	8

Keyword	CPC	PCC	Volume	Score
when was the printing press invented	0.3	0.2	5718	90
when was the printing press invented date	0.13	1	2164	40
when was the printing press invented in china	0.42	0.6	2920	98
when was the printing press invented europe	0.99	0.3	6982	10
when was the printing press invented england	1.73	0.6	8960	33
when was the printing press invented uk	0.1	0.7	2126	29
when was the printing press invented britain	0.34	0.6	7747	67
when was the printing press invented year	1.82	0.8	4286	84
printing press invented	0.81	0.9	6604	27
when was the first printing press invented	0.99	0.9	6104	21
invented the printing press for europe	0.06	0.4	8125	49
printing press was invented by	2	0.9	2466	6
first printing press invented	1.07	0.9	2969	62
printing press invented in the renaissance	1.35	0.6	465	27