when was the nyc subway built

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
when was the nyc subway built	1.07	0.4	3825	78	29
when	1.11	1	6082	2	4
was	0.29	0.9	5849	87	3
the	1.63	1	1622	2	3
nyc	1.13	0.5	5332	52	3
subway	0.04	0.5	5357	83	6
built	0.27	0.8	8251	5	5

Keyword	CPC	PCC	Volume	Score
when was the nyc subway built	1.2	1	1851	76
when was the nyc subway system built	0.56	0.2	5776	74
when was the first subway built in nyc	1.73	0.7	3896	45
who built the nyc subway system	0.1	0.5	1577	13
how was the nyc subway built	0.2	0.1	874	14
what year was the nyc subway built	2	0.3	6083	36
history of the nyc subway system	1.09	0.1	3201	12
history of the new york subway system	0.78	0.9	7551	86
when did nyc subway open	1.93	0.3	5950	54
history of new york city subway system	0.55	0.3	3424	33
new york subway built	1.83	0.4	9331	30