Keyword Analysis & Research: why is it called the iron curtain

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is it called the iron curtain	1.65	0.6	7681	99	33
why	0.08	0.5	5991	18	3
is	0.97	0.2	2213	73	2
it	0.26	0.3	4435	27	2
called	1.65	0.5	3258	53	6
the	1.87	0.6	8025	39	3
iron	1.21	1	6229	21	4
curtain	1.79	0.9	317	55	7

Keyword	CPC	PCC	Volume	Score
why is it called the iron curtain	1.85	0.4	6154	23
why was it called the iron curtain	1.21	0.9	6406	90
why is the iron curtain called that	0.35	0.8	2148	44
why is russia called the iron curtain	0.46	0.8	2890	35
why was the iron curtain called that	0.34	0.2	6702	65
why was sovient union called iron curtain	0.78	0.2	5409	56