use of comma before and rule

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
use of comma before and rule	0.32	0.4	2664	79	28
use	1.47	0.3	4611	86	3
of	0.69	1	6498	66	2
comma	0.53	0.3	4390	34	5
before	0.53	1	7842	66	6
and	0.45	0.5	7716	96	3
rule	1.77	0.3	6036	41	4

Keyword	CPC	PCC	Volume	Score
use of comma before and rule	1.83	1	4368	23
use of a comma before and	0.46	1	1231	80
comma before and rule list	0.9	0.3	9775	85
comma before too rule	0.36	0.7	4351	64
when is a comma needed before and	0.3	0.3	7711	22
use of a comma before the word or	1.15	0.9	6920	69
do you use a comma before and	0.01	0.1	6432	74
when to use a comma before and	1.81	0.9	7956	55
can we use comma before and	0.93	0.9	9250	84
when to use a comma before but	1.61	0.8	4750	93
can you use a comma before and	0.66	0.2	4592	30
do you use a comma before but	0.21	1	1119	50