printing press was invented by

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
printing press was invented by	0.47	0.8	7338	65	30
printing	0.14	0.7	7840	15	8
press	1.78	0.2	4677	26	5
was	0.06	0.6	638	88	3
invented	1.83	1	6898	31	8
by	0.48	0.7	6834	60	2

Keyword	CPC	PCC	Volume	Score
printing press was invented by	1.16	0.4	3905	62
printing press was invented in which year	1.98	0.9	1294	55
printing press was invented during what age	0.31	0.3	6154	99
printing press was invented when	0.32	0.3	1721	42
printing press was invented where	1.24	0.8	8861	72
printing press was invented in which period	1.04	0.9	444	79
who invented the printing press	0.63	0.7	1923	6
printing press invented	1.93	0.1	8089	77
what year was the printing press invented	0.91	0.5	4324	69
when was the first printing press invented	1.94	0.4	2620	75