Keyword Analysis & Research: when was the mainframe invented

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the mainframe invented	0.56	0.6	2948	27	31
when	0.78	0.2	9559	63	4
was	0.02	0.7	5826	83	3
the	0.77	0.9	286	10	3
mainframe	1.6	0.2	6442	53	9
invented	1.25	0.6	8158	31	8

Keyword	CPC	PCC	Volume	Score
when was the mainframe invented	1.97	0.5	6609	71