Discover uses of "security fence," "apartheid wall" and "security barrier" in news media, outputting a table. Select all, and paste special in MS-Excel. Results may be visualized in a number of ways, including the following network diagram showing associations between terms and media sources.

See: R. Rogers and A. Ben-David, "Coming to Terms: A conflict analysis of the usage, in official and unofficial sources, of 'security fence,' 'apartheid wall,' and other terms for the structure between Israel and the Palestinian Territories," unpublished ms., 2005. [pdf] [summary]