Keyword Analysis & Research: when was the slide rule invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the slide rule invented	1.21	0.2	3549	88	32
when	0.2	0.7	4271	95	4
was	0.15	0.2	1331	6	3
the	1.45	0.8	8820	5	3
slide	0.69	0.3	6148	20	5
rule	1.83	0.8	9867	98	4
invented	1.79	0.3	4884	28	8

Keyword	CPC	PCC	Volume	Score
when was the slide rule invented	1.48	0.5	4064	93
who invented the slide rule	0.32	0.3	7264	40
slide rule was invented by	1.33	0.9	4194	32
slide rule invented	1.76	0.1	4420	26
what year was the slide rule invented	0.1	0.9	2845	92
slide rule invented date	1.53	0.6	5168	48
slide rule invented by william oughtred	1.86	1	2421	97
who invented the slide rule in 1622	0.77	0.6	8700	4
when were slide rules invented	1.84	0.8	1209	71