Keyword Analysis & Research: why is zero not a natural number

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is zero not a natural number	1.57	1	7003	15	32
why	0.43	0.2	4552	64	3
is	1.5	0.3	1161	8	2
zero	0.02	0.5	8682	84	4
not	0.32	0.9	8492	96	3
a	0.73	0.5	6445	63	1
natural	0.31	0.9	1167	62	7
number	1.98	0.9	1365	60	6

Keyword	CPC	PCC	Volume	Score
why is zero not a natural number	0.64	0.8	8786	52