How is keyword difficulty calculated searching

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Keyword	CPC	PCC	Volume	Length string	Score
how is keyword difficulty calculated	0.9	1	4579	36	11
how to check keyword difficulty	0.07	0.8	796	31	94
what is keyword difficulty	1.5	0.7	7370	26	40
what's true about keyword difficulty	0.46	0.6	4548	36	2
check keyword difficulty tool	1.81	0.2	6167	29	30
keyword difficulty score meaning	1.77	0.9	2014	32	58
keyword suggestion with keyword difficulty	1.16	1	1016	42	50
best keyword difficulty software	0.38	0.7	2019	32	85
free keyword difficulty tool	1.74	0.2	7441	28	49
keyword difficulty checker free	1.52	0.7	3824	31	84
how to check for keywords	1.42	0.4	5443	25	16
free keyword difficulty checker tool	1.11	0.7	6284	36	45
how to do keyword analysis	0.14	1	6889	26	1
how to find keyword	0.97	0.7	708	19	7
keywp - keyword difficulty checker	0.58	0.8	1367	34	46
how to understand the keyword	1.79	0.4	6517	29	93
insufficient number of keywords	1.61	0.4	2351	31	65
keywords in word problems	0.34	0.6	4816	25	31
keywords in problem solving	0.74	0.1	3509	27	59

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