Keyword Analysis & Research: what does c of o mean

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
what does c of o mean	0.24	0.1	3889	67	21
what	0.15	0.9	6202	20	4
does	2	0.9	4309	29	4
c	1.45	0.2	4623	94	1
of	0.74	0.3	2935	65	2
o	0.51	0.8	6341	38	1
mean	1.64	0.6	4690	33	4

Keyword	CPC	PCC	Volume	Score
what does c of o mean	1.14	0.7	5086	61