Keyword Analysis & Research: why is it called a stone

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is it called a stone	0.01	0.4	2591	50	24
why	0.56	0.9	7293	10	3
is	1.98	1	5078	50	2
it	1.32	0.3	5684	30	2
called	0.86	1	2882	71	6
a	0.72	0.2	3316	70	1
stone	0.65	0.1	1187	52	5

Keyword	CPC	PCC	Volume	Score
why is it called a stone	0.61	0.4	9450	78